90% files i created can't be searched in search result.

eg: i created a file named "1687-DW" in zoho write, and i saved. I can see the file when i click the folder in zoho doc. But when i search it in search bar "1687-DW", it shows: No Results found for "1687-DW". Why?

I can find the file named "280097-DE" which i created on Mar.02 with the same way, just can't search it. Any body could help me and fix it?

Thank you.