Perhaps you should try some spelling variations:
demand books » hand books, land books
yang yang » wang yang, wang yan
wang cong » wang yong, wang hong, wang yang
cong sun » cong shu, cong van, wing sun
yang ka » yang fan, yang yao
yang yi » yang di, yang xi, yang jui
3 loan » _ loan, 3 load, 4.3 loan
nr 3 » nr 1, nr 2, nr 4

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((((yang ka) OR (yang yang))) OR (yang yi))nr 3 loan demand books wang cong sun ;~.
• Adding a wildcard symbol may retrieve word variants: ((((yang ka) or (yang yang))) or (yang yi))nr 3 loan demand books wang cong sun ;*.