Perhaps you should try some spelling variations:
john song » john wong, john bonn, john ngosong
wang yang » wang yan, wang liang, wang yanling
tan chia » tuan china, than china, can china
dan yang » daun yang, tan yang, yang yang
jin song » jie song, kim song, jin ying
tan hua » tuan hua, wang hua, tan puay
un yang » daun yang, hui yang, tan yang

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 yang ((tan hua) OR (tan chia)) ((dan yang) OR (un yang)) ((jin song) OR (john song)) shu ;~.
• Adding a wildcard symbol may retrieve word variants: wang yang ((tan hua) or (tan chia)) ((dan yang) or (un yang)) ((jin song) or (john song)) shu ;*.