Perhaps you should try some spelling variations:
wang yang » wang yan, wang liang, wang yanling
wan wang » wen wang, yan wang, qian wang
wong sau » wong sam, wong shiu, kong sar
wong siu » wong shiu, kong siu, wong siew
dan hua » tan hua, wang hua, dong hua
hua ren » hua chen
yan jiu » yang jie, yang jin, pang jiu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wan wang) OR (wang yang)) dan hua ren yan jiu ((((wong lai) or (wong sau))) or (wong siu)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wan wang) OR (wang yang)) dan hua ren yan jiu ((((wong lai) OR (wong sau))) OR (wong siu)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wan wang) OR (wang yang)) dan hua ren yan jiu ((((wong lai) or (wong sau))) or (wong siu)) ;*".