Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh tung » thanh tung, manh tung, hanh dung
dong cong » duong cong, dung cong, dang cong
hoc hieu » hoc thieu, hoc hien, doc hieu
anh tang » anh bang, anh dang, anh nang
cua dong » chua dong, cua cong, cua dang
cong dan » cong san, cong tan, huong dan
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 hieu manh - ((hanh tung) or (anh tang)) cua dong cong dan ((than cau) OR (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - ((hanh tung) OR (anh tang)) cua dong cong dan ((than cau) OR (phan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - ((hanh tung) or (anh tang)) cua dong cong dan ((than cau) OR (phan cau))".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - ((hanh tung) or (anh tang)) cua dong cong dan ((than cau) OR (phan cau))*.