Search is not working after upgrading to OJS 3.4.0.5

Hi,
Since upgrading to OJS version 3.4.0.5 from 3.3.0.15, the search is broken. Earlier when we searched with complete title or part of title of the article it would bring up the exact article but now it brings up a large list and the required article is listed down the list somewhere. I have tried the suggestions on the forums and have rebuild the search index from command line. Same is the case with another journal that is on version 3.4.0.4

If anyone else has encountered the same issue or can suggest a solution, I shall be grateful.
Thanks

Hi @Dr_Umar!

The behavior of the search was updated from keywordA AND keywordB to keywordA OR keywordB, this should bring more results, but the list should be sorted based on the number of occurrences of the keywords.

Best,
Jonas Raoni