Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh trung » thanh trung, hanh trang, manh trung
nhung cong » dung cong, thong cong, hang cong
hien hanh » dieu hanh
trung cap » truong cao, trung tam
cap nhung » cam nhung, vap nhung, dap nhung
cong ban » cong bang, cong san, cong tan
khan cap » khan ap, khoan cam, phan cac
than cap » thanh lap, thanh cac, than cua

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