Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thieu sach » chieu sach, thien hach, hieu cach
hanh trung » thanh trung, hanh trang, manh trung
tam nhung » tham nhung, cam nhung, lam nhung
nam nhung » cam nhung, tham nhung, va nhung
cong ban » cong bang, cong san, cong tan
ban khan » ban than, ban nhan, ban chan
khan cap » khan ap, than cap, khoan cam

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) or (thien thanh)) - hanh trung ((tam nhung) OR (nam nhung)) cong ban khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (thien thanh)) - hanh trung ((tam nhung) OR (nam nhung)) cong ban khan cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) or (thien thanh)) - hanh trung ((tam nhung) OR (nam nhung)) cong ban khan cap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) or (thien thanh)) - hanh trung ((tam nhung) OR (nam nhung)) cong ban khan cap*.