Perhaps you should try some spelling variations:
demand books » hand books, land books
yang yang » wang yang, wang yan
wang yong » wang yang, wang hyoung, wang yan
yong suk » chong suk, cong sun, rong su
yang ka » yang fan, yang yao
yang yi » yang di, yang xi, yang jui
4 loan » _ loan, 3 loan, 4 load
nr 4 » nr 1, nr 2

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 4 loan demand books wang yong suk ;~.
• Adding a wildcard symbol may retrieve word variants: ((((yang ka) or (yang yang))) or (yang yi))nr 4 loan demand books wang yong suk ;*.