Perhaps you should try some spelling variations:
wang yang » wang yan, wang yanling
sang minh » kang minah, anh minh, song min
tan chia » tuan china, than china, can china
lee sang » lee ann
hong ghi » zhong zhi, hong g
hong hai » shang hai, zhong tai, dang hai
tan zhi » yan zhi, wang zhi

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 liang) OR (wang yang)) ((tan zhi) OR (tan chia)) lee sang minh ((hong ghi) OR (hong hai)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang liang) or (wang yang)) ((tan zhi) OR (tan chia)) lee sang minh ((hong ghi) or (hong hai)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang liang) or (wang yang)) ((tan zhi) OR (tan chia)) lee sang minh ((hong ghi) or (hong hai)) ;*.