Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
tran thanh » ban thanh, van thanh, quan thanh
hieu cach » hieu cac, chieu sach, hieu ca
tan thanh » tang thanh, toan thanh, ban thanh
toc hieu » toc thieu, doc hieu, hoc thieu
va thong » va phuong, he thong, va cong

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc hieu cach - thanh tuong ((va thong) or (va thuong)) cong ((tan thanh) OR (tran thanh)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc hieu cach - thanh tuong ((va thong) OR (va thuong)) cong ((tan thanh) OR (tran thanh)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc hieu cach - thanh tuong ((va thong) or (va thuong)) cong ((tan thanh) OR (tran thanh)) cao".
• Adding a wildcard symbol may retrieve word variants: toc hieu cach - thanh tuong ((va thong) or (va thuong)) cong ((tan thanh) OR (tran thanh)) cao*.