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

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 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 cao".
• Adding a wildcard symbol may retrieve word variants: toc hieu cach - thanh tuong ((va thong) OR (va thuong)) cong tan thanh cao*.