Perhaps you should try some spelling variations:
wang danning » wang yanling, wang daoping, wang yangming
dong hoang » hong hong
yan congo » yan cong
congo shu » cong shu
chen yu » chen y, chen yulu, cheng lu
yu yan » yu yang, mu yan, xu yan
y a » y la
e a » et a

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: ((((wang danning) OR (dong hoang))) OR (dong sin)) ((y a) OR (e a)) chen yu yan congo shu ;~.
• Adding a wildcard symbol may retrieve word variants: ((((wang danning) or (dong hoang))) or (dong sin)) ((y a) or (e a)) chen yu yan congo shu ;*.