Perhaps you should try some spelling variations:
yang yang » wang yan
wang yang » wang yan, wang liang, wang yanling
test ying » test using, test playing
ying john » king john, young john, ying jin
john wong » john song, john bonn
hua test » a test
wong yue » wang yue, hong yu

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 yang) OR (wang yang)) ((yaa OR yama) OR yana) hua test ying john wong yue ;~.
• Adding a wildcard symbol may retrieve word variants: ((yang yang) or (wang yang)) ((yaa or yama) or yana) hua test ying john wong yue ;*.