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