Perhaps you should try some spelling variations:
van thanh » tran thanh, phan thanh, lam thanh
daun yang » dan yang, du yang, un yang
wang van » wang yan, wang ban, wang dan
thanh vu » thanh van, thanh _
ren yang » ren yan, chen yang, dan yang
tan yang » dan yang, tan ying, tan yong
tin wong » tin hong, t.j wong, kie wong
wong yi » weng yi, wong y, wong lai

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 van thanh vu ((ren yang) OR (((daun yang) OR (tan yang)))) tin wong yi ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang van thanh vu ((ren yang) or (((daun yang) OR (tan yang)))) tin wong yi ;~".
• Adding a wildcard symbol may retrieve word variants: wang van thanh vu ((ren yang) or (((daun yang) OR (tan yang)))) tin wong yi ;*.