Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
trung cap » truong cao, trung tam
tang cua » mang cua, hang cua, tang luan
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
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 - hanh ((trung cap) or (tang cua)) nhung ((cong dan) or (cong tan)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh ((trung cap) OR (tang cua)) nhung ((cong dan) OR (cong tan)) than cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh ((trung cap) or (tang cua)) nhung ((cong dan) or (cong tan)) than cau*.