maybe some one would be willing to write a file search system hack (s.
https://www.mobileread.com/forums/sho...8&postcount=61)
The Kindle file search system is deficient in many ways and could be easily improved, if Amazon wanted to. For some reasons, nothing has changed in this respect since a couple of years.
E.g. you won't be able to find the files like ThisForumRocks.pdf, without knowing the exact name.
No problem with the hack described above.
By indexing the pdf, txt, and mobi files, it would be easy to implement a search for combinations (e.g. "running towards") in your files as well.