Perhaps you should try some spelling variations:
hien hanh » dieu hanh
hanh manh » hanh mang, lanh manh, hoang manh
dang cong » dung cong
manh cua » doanh cua, ban cua
cua dang » cua cong, cua ban
cong tan » cong tac, cong san, cong thanh
than cau » toan cau, than cap, thanh chau
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien hanh - hanh manh cua dang cong tan ((than cau) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - hanh manh cua dang cong tan ((than cau) OR (phan cau)).
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - hanh manh cua dang cong tan ((than cau) or (phan cau))*.