Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, hien hanh
anh quang » anh xquang, anh quan, nhanh quang
luan hung » luan chung, lan hung, luan ung
hung cong » nhung cong, hung cuong, phung cong
anh bang » anh hoang, tinh bang, anh dong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (dieu hanh)) - ((anh bang) OR (anh quang)) luan hung cong tan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (dieu hanh)) - ((anh bang) OR (anh quang)) luan hung cong tan toan cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (dieu hanh)) - ((anh bang) OR (anh quang)) luan hung cong tan toan cau*.