Perhaps you should try some spelling variations:
wang ying » wang yang, wang yong, wang jing
sing long » using long, sing kong, qing long
yang li » yang lin, yang di, yang yi
yang xi » yang di, yang yi, yang jui
li song » li cong, kim song, jie song
li rong » yi rong, li cong, shi rong
long do » long d, long du, longer do

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 ying) OR (wang yan)) ((yang li) OR (yang xi)) ((li song) OR (li rong)) sing long do ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang ying) or (wang yan)) ((yang li) or (yang xi)) ((li song) OR (li rong)) sing long do ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang ying) or (wang yan)) ((yang li) or (yang xi)) ((li song) OR (li rong)) sing long do ;*.