Combine 2 IF formula return 2 different value

I have a list of such titles about 2000

A1: Titles
A2: 10 Facebook Marketing Ideas for Small Business
A3: 10 Fun Facts About Social Media
A4: 10 Fitness Tips for Health Life

And I have about 20 popular singular word from the above title that I want to use as tags for each title
B1: Popular Singular Words in The List of 2000 titles (there are 20 such words)
B2: Business
B3: Social
B4: Health
B5: Fitness
B6: Marketing
B7: Facebook


In C2 I want to return multiple values i.e Marketing, Business, Facebook these are the 3 tags assigned to the title in A2. Since I only have 20 popular words to tag, is there a way I can combine the below formula 20 times in single cell and return multiple values separated by comma maybe by using concatinate.

=IF((ISNUMBER(SEARCH(B2,A2))),B2,"")