@bradleynweb
An example or two of an "exact" search that does not find an item might be helpful so that others can see what the problem might be. If you could provide a link to your search results and mention the sort order used, along with the item number that does not appear, that should help.
There are some quirks to eBay's search that can cause issues.
Sorting by "Price plus shipping: lowest first" can trigger filtered results, showing fewer results, often many fewer results. There should be a "show more results" link at the top of the sort, but it may not always appear.
"Best match" sort order has the opposite issue, finding additional results that do not appear in other sorts.
Avoid those sort orders, if possible, when you want to see all relevant results by default.
In one memorable case a seller included a dash directly before a title keyword, which eBay's search treats as an exclusion term, so a search of the exact title -- copied and pasted directly into the search field -- forced eBay to actually exclude the listing from the results. Leaving out the dash allowed the title to be found.
Searching in the description should find more results than searching in the title (and item-specifics) alone -- unless the search uses an exclusion, in which case any potential result with the excluded term in the description would no longer appear in that search at all, even if it appeared in the original (non-description) search.
If a search is not finding results that you think should be found, sometimes it makes sense to try a different search to see if that works better.
In some cases, eBay seems to group certain keywords together and treat the group as an entirely separate keyword, independent of each individual keyword. Sometimes word order matters, even when it appears that it should not.
