Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
hoc hieu » hoc thieu, hoc hien, doc hieu
tinh cua » trinh cua, sinh cua, tinh chat
cong ban » cong bang, cong san, cong dan
cong tan » cong tac, cong san, cong thanh
than cap » khan cap, thanh lap, thanh cac
luat » luan, xuat

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - hanh ((trinh luat) or (tinh cua)) hang ((cong ban) OR (cong tan)) than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh ((trinh luat) OR (tinh cua)) hang ((cong ban) OR (cong tan)) than cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - hanh ((trinh luat) or (tinh cua)) hang ((cong ban) OR (cong tan)) than cap".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh ((trinh luat) or (tinh cua)) hang ((cong ban) OR (cong tan)) than cap*.