Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
thanh tran » thanh trang, thanh toan, thanh tra
bang cong » bang song, dung cong, cong cong
hang cong » hang nong, thanh cong, thong cong
dang cong » dung cong
doc hieu » toc thieu, hoc thieu, hoc hien
tran van » luan van
san khan » san khau, san khac, san phan
khan cap » khan ap, than cap, khoan cam

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: doc hieu nganh - thanh tran van ((bang cong) OR (((hang cong) OR (dang cong)))) san khan cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu nganh - thanh tran van ((bang cong) or (((hang cong) OR (dang cong)))) san khan cap~".
• Adding a wildcard symbol may retrieve word variants: doc hieu nganh - thanh tran van ((bang cong) or (((hang cong) OR (dang cong)))) san khan cap*.