Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
thieu hach » thien hach, chieu sach, hieu cach
hoc thieu » toc thieu, hoc hien
tuong cua » truong cua, huong cua, thong cua
cua thong » cua thuong, cua khong, cua tong
cong tac » cong ty
toan ban » van ban

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 hach - thanh tuong cua thong ((cong san) OR (cong tac)) toan ban~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu hach - thanh tuong cua thong ((cong san) or (cong tac)) toan ban*.