Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, nghiep nganh
hieu manh » chieu xanh, dieu hanh, hien hanh
bang luan » tang luan, hang luan, dung luan
luan hung » luan chung, lan hung, luan ung
hung cong » nhung cong, hung cuong, phung cong
cong sang » cong san, cong lang, cong vang
sang than » cang thang, dang thanh, sang tao
anh bang » anh hoang, anh quang, tinh bang
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu manh) or (hieu nganh)) - anh bang luan hung cong sang than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu manh) OR (hieu nganh)) - anh bang luan hung cong sang than cau.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu manh) or (hieu nganh)) - anh bang luan hung cong sang than cau*.