Search for multiple words in a single cell in google sheets

https://docs.google.com/spreadsheets/d/1nIlL87-IpDKmZbWEgL-NwaIYLwhiUTq2Q2FgbMolJ_I/edit#gid=0

I wrote the Indexes of my notebooks in Google sheets to make them easy to find.

But the Find function only looks for one word in the Google Sheets cell.

I want it to look for multiple words like:

Chemistry class notes of Sept. 14, 2021

Chemistry class notes of Sep. 15, 2021

I want to find the index for Chemistry Class notes of Sept. 15, 2021 by typing:

chemistry sep 15

How can I get it done?

thx so much