Perhaps you should try some spelling variations:
john using » john king
yang john » young john, king john, yang jin
using sar » using sat, using svr, using smart
tuan hua » tan hua, tuan vu, yuan hui
thanh vu » thanh van, thanh _
tan puay » tan hua
dan yang » daun yang, tan yang, wang yang
wang » wing, wan, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yan ((((tuan hua) or (thanh vu))) or (tan puay)) dan yang john using sar ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan ((((tuan hua) OR (thanh vu))) OR (tan puay)) dan yang john using sar ;.
• Adding a wildcard symbol may retrieve word variants: wang yan ((((tuan hua) or (thanh vu))) or (tan puay)) dan yang john using sar ;*.