Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
thieu hanh » thien thanh, thien chanh, thieu khang
hoc thieu » toc thieu, hoc hien
nhan ung » phan ung, han ung, nham ung
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
gian cau » gian chau, gian cac, gian cam
gian dan » gian lang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu hanh - doanh doanh nhan ung ((cong dan) OR (cong san)) ((gian cau) or (gian dan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu hanh - doanh doanh nhan ung ((cong dan) OR (cong san)) ((gian cau) OR (gian dan)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu hanh - doanh doanh nhan ung ((cong dan) OR (cong san)) ((gian cau) or (gian dan))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu hanh - doanh doanh nhan ung ((cong dan) OR (cong san)) ((gian cau) or (gian dan))*.