Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh tung » thanh tung, manh tung, hanh dung
cong cong » cong dong, trong cong, dung cong
hoc hieu » hoc thieu, hoc hien, doc hieu
anh dang » anh dung, anh bang, anh danh
anh dong » anh huong, anh son
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

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