I am glad to hear they are working on this issue... because as is, it is just about completely useless.
Viewing post in Bundle hiding and lack of search/filter
For the time being you can use this to sort out games based on their metadata like genre, game tags, etc
https://docs.google.com/spreadsheets/d/12X7fnRAQO1nITKjsM63Wwmd0kyJNIra1jDYAx12Nad8/edit#gid=782418878