Perhaps you should try some spelling variations:
lang lang » ylang ylang
daun yang » du yang, tan yang, un yang
john wong » john song, john bonn
yan wang » yuan wang, yang yang, qian wang
dong hua » wang hua, tong hui, dong hoi
dan yang » tan yang, wang yang, yang yang
wong sau » wong sam, wong siu, wong shiu

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: ((yan wang) OR (lang lang)) dong hua ((dan yang) OR (daun yang)) john wong sau ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yan wang) or (lang lang)) dong hua ((dan yang) OR (daun yang)) john wong sau ;~".
• Adding a wildcard symbol may retrieve word variants: ((yan wang) or (lang lang)) dong hua ((dan yang) OR (daun yang)) john wong sau ;*.