Perhaps you should try some spelling variations:
brown douglas » dowd douglas, irwin douglas, john douglas
booth douglas » north douglass, hough douglas
theme first » them first, time first, tree first
main theme » main themes, main theorem
kong main » kong remain, kong mario, kong maps
tan kong » tan hong

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "tan kong main theme first things ((booth douglas) OR (brown douglas)) b ;~".
• Adding a wildcard symbol may retrieve word variants: tan kong main theme first things ((booth douglas) OR (brown douglas)) b ;*.