Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, nghiep nganh
thanh tung » thanh cong
tung thuat » thuong thuat, trong thuat, vuong thuat
hieu manh » chieu xanh, dieu hanh, hien hanh
thuat dan » thuat san, thuat ban, thuat dam
dan cong » dang cong, van cong, dan dong
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: doc ((hieu nganh) or (hieu manh)) - thanh tung thuat dan cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu nganh) OR (hieu manh)) - thanh tung thuat dan cong tan van ban*.