Perhaps you should try some spelling variations:
chen yang » chen rong
john kong » john king, john song, john wong
wang anh » dang anh, wang yang, wang yan
tuan hua » tuan vu, yuan hui
ren yang » ren yan, dan yang, pei yang
tan hua » wang hua, tan chia, tan puay
sar » sara, star, saur

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang anh ((tuan hua) or (tan hua)) ((ren yang) OR (chen yang)) john kong sar ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang anh ((tuan hua) OR (tan hua)) ((ren yang) OR (chen yang)) john kong sar ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang anh ((tuan hua) or (tan hua)) ((ren yang) OR (chen yang)) john kong sar ;".
• Adding a wildcard symbol may retrieve word variants: wang anh ((tuan hua) or (tan hua)) ((ren yang) OR (chen yang)) john kong sar ;*.