Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
thanh tung » thanh cong
hoc thieu » toc thieu, hoc hien
cua khong » hua khong, cua phuong, cua thuong
tung cua » trung cua, tuong cua, dung cua
cong tac » cong ty
than cau » toan cau, phan cau, than cap

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 sach - thanh tung cua khong ((cong san) or (cong tac)) ((than cau) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh tung cua khong ((cong san) OR (cong tac)) ((than cau) OR (phan tu)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh tung cua khong ((cong san) or (cong tac)) ((than cau) or (phan tu))*.