What are you searching for, and how are you sorting?
The "Price plus shipping: lowest first" sort order provides filtered results -- often drastically filtered. And the option to "see more results" may not always be shown as it should. The filtering may vary depending on the keywords used.
This is not really an app issue; the same problem occurs when using the web site.
If you encounter a drastically filtered result for a keyword search using a desktop browser, you should be able to use the "Feedback" link in the lower right corner of the search results to provide feedback on your search to eBay developers. The more users provide info, the more likely something is to be done about the over-filtration problem.
You can avoid that "lowest first" filtering problem by using a different sort order.
