Perhaps you should try some spelling variations:
quang khang » quang khanh, quang thanh, quang khai
hieu nganh » vien nganh, hiem ngan, nghiep nganh
thanh tran » thanh trang, thanh toan, thanh tra
quang hang » quang hoang, quang thang, quang hung
hieu manh » chieu xanh, dieu hanh, hien hanh
cong tan » cong tac, cong san, cong thanh
tan van » tran van, tang van, luan van

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) or (hieu nganh)) - thanh tran ((quang hang) OR (quang khang)) cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (hieu nganh)) - thanh tran ((quang hang) OR (quang khang)) cong tan van ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (hieu nganh)) - thanh tran ((quang hang) OR (quang khang)) cong tan van ban*".