Use your search terms and include another term,  such as

Japanese americans   internment

and then one of the following

diaries

letters

"personal narratives"

If you find one good book this way, click on the subject heading lower down on its record and see what  you find.

In many databases  you can limit by date, type in title of book, play or film (use quote marks "  "), the author/director's last name and also the word review.  

Example 1:      "The Sun Also Rises"    Hemingway   review

Example 2       "A Raisin in the Sun"   Wright   play review

This trick works well in the following: