Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
doanh tham » doanh thanh, doanh tai, doanh thu
thong cong » trong cong, tong cong, thong thong
gian chau » gian cham, gian cua, gian cac
hoc hieu » hoc thieu, hoc hien, doc hieu
cong dan » cong san, cong tan, huong dan
gian cau » gian cac, gian cam, gian cu

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 nganh - hanh ((doanh tham) OR (doanh nhan)) thong cong dan ((gian cau) or (gian chau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu nganh - hanh ((doanh tham) OR (doanh nhan)) thong cong dan ((gian cau) OR (gian chau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu nganh - hanh ((doanh tham) OR (doanh nhan)) thong cong dan ((gian cau) or (gian chau))".
• Adding a wildcard symbol may retrieve word variants: hoc hieu nganh - hanh ((doanh tham) OR (doanh nhan)) thong cong dan ((gian cau) or (gian chau))*.