You are very welcome. Glad to hear that helped.
Here is something I have previously posted about why eBay's search does not simply provide all literal results that match the search keywords unless users searching specifically take steps to bypass the "smart" search features:
Two users searching using the exact same keywords may have very different ideas about what they are searching for and what results should be displayed. There is no solution that gives everyone exactly what they want, since different people want entirely different and contradictory outcomes for the same inputs.
Some users want straightforward, logically-consistent and complete results. Everything that matches the search terms, and nothing that doesn't. Lots of folks say that they want that, but the folks that really do are likely a small minority of users. Many of these are sellers that are concerned that their items are not being shown in eBay's searches otherwise. Mostly these sellers want other peoples' searches to work the way that the seller thinks benefits the seller, regardless of what potential buyers actually want.
Other users want to be able to pick up their phones, start up their apps, enter a couple of intuitive keywords and have eBay find certain things even if those listings use spelling variants or plurals, or even completely different keywords that are synonyms for the chosen keywords, without the users having to learn complex search syntax rules or having to check filter options or to choose specific categories. Those users want to type "widget" into the search and see results that are real widgets, not widget accessories, or widget plans, or widget parts, or books about widgets, or t-shirts or coins or stamps or stickers with widgets on them. Just actual widgets.
eBay's chosen search is a compromise between those two basic types of searches.
Using certain explicit search commands (quotes, exclusions, parenthetical "OR" terms) will result in a literal search for the exact keywords with no substitutions or category changes. If you want literal and complete results, try using one of those search commands when searching. But keep in mind you lose the benefit of keyword substitutions that might help you find additional results. Very few users bother to do that for every search, though they certainly can if they want literal results every time.
Simply searching using certain keywords without using any of those explicit search commands will often steer the results into a particular category, or may trigger a spelling correction or keyword substitution. Using a certain sort order (lowest first) will result in results being filtered to remove listings that eBay considers to be less likely to result in a sale, however eBay calculates that. If there are few or no results, eBay may choose to ignore some of the search keywords entirely, or to expand the search to include terms in the body of the description, even if the user searching has not requested any of that.
Ultimately eBay wants to maximize revenue, which means showing results that users are likely to purchase, even at the expense of logical consistency and completeness.
A complicated search that on average produces some reasonable results for the marginal user -- but that can also be overly complicated and sometimes fails rather spectacularly -- is preferable in eBay's eyes to an alternative search that may make more sense for users but that results in fewer total sales and ultimately makes eBay less money.
eBay may try to tinker with the keywords to avoid some obvious failures as they are identified, but the more "intuitive" search is made, the more synonyms, spelling corrections, automatic category switches that eBay has to make exceptions for, the greater the opportunity for edge cases that slip through the cracks and are not satisfied without adding yet more exceptions on top of exceptions. And pretty soon sellers are listing dolls in an industrial die machine category, because that is where search is directing buyers who search using a particular keyword.
