Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
thanh nung » thanh tung, thanh hung, thanh dung
hoc thieu » toc thieu, hoc hien
nung cao » nang cao, nhung cau, quang cao
cao tong » cao tang, cao cong, cao dong
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 nung cao tong ((huong dan) 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 nung cao tong ((huong dan) OR (cong tac)) ((than cau) OR (phan tu)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh nung cao tong ((huong dan) or (cong tac)) ((than cau) or (phan tu))*.