Perhaps you should try some spelling variations:
thieu tach » thien hach, chiet tach, chieu sach
thanh tung » thanh cong
hoc thieu » toc thieu, hoc hien
cong tang » cong thang, cong lang, cong vang
tung cua » trung cua, tuong cua, dung cua
cong tan » cong tac, cong san, cong thanh
hanh cac » hang cac, hanh cat, hanh cham

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu tach - thanh tung cua cong ((cong tan) or (cong tang)) hanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tach - thanh tung cua cong ((cong tan) OR (cong tang)) hanh cac*.