Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, nghiep nganh
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
thanh thao » thanh thanh, thanh thang, thanh pho
hieu manh » chieu xanh, dieu hanh, hien hanh
cong vang » cong lang, cong quang, cong ngang
thanh cao » thanh ca, thanh cac, thanh cham
ho nhung » cho nhung, hoa nhung, hoc nhung
tung ho » tuong ho, trung hoc, trung hoa

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 tung ho nhung cong vang ((thanh cao) OR (thanh thao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (hieu nganh)) - thanh tung ho nhung cong vang ((thanh cao) OR (thanh thao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (hieu nganh)) - thanh tung ho nhung cong vang ((thanh cao) OR (thanh thao))".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (hieu nganh)) - thanh tung ho nhung cong vang ((thanh cao) OR (thanh thao))*.