Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
va tuong » va thuong, va thong, xa truong
cong ban » cong bang, cong san, cong tan
toan cau » toan cao, toan ban, toan tap
khan cap » khan ap, than cap, khoan cam
va dung » van dung, va duong, vat dung

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 trung ((va dung) or (va tuong)) cong ban ((toan cau) or (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh trung ((va dung) OR (va tuong)) cong ban ((toan cau) OR (khan cap)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh trung ((va dung) or (va tuong)) cong ban ((toan cau) or (khan cap))*.