Perhaps you should try some spelling variations:
thieu tach » thien hach, chiet tach, chieu sach
thanh tung » thanh cong
nhung cong » dung cong, thong cong, nhung don
hoc thieu » toc thieu, hoc hien
hang cong » dang cong, hang nong, bang cong
toan cao » toan ban
toan tap » toan ban
tung va » trung va, tuong va, dung va

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: hoc thieu tach - thanh tung va ((nhung cong) OR (hang cong)) danh ((toan cao) OR (toan tap))~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu tach - thanh tung va ((nhung cong) or (hang cong)) danh ((toan cao) or (toan tap))*.