Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, hien hanh
manh tung » manh hung, thanh tung
tung cap » trung cap, cung cap, thong cap
cap dang » cao dang, cac dang, cap bang
cong dan » cong san, cong tan, huong dan
cong tac » cong ty
phan tap » phan lap, han tap, pha tap

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) or (dieu hanh)) - manh tung cap dang ((cong dan) or (cong tac)) phan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (dieu hanh)) - manh tung cap dang ((cong dan) OR (cong tac)) phan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (dieu hanh)) - manh tung cap dang ((cong dan) or (cong tac)) phan tap*.