Perhaps you should try some spelling variations:
hien hanh » dieu hanh
dung cong » dung trong
anh bang » anh hoang, anh quang, tinh bang
cong dan » cong san, cong tan, huong dan
toan cao » toan tap
toan ban » van ban
bang va » hang va, ban va, trang va
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien hanh - anh bang va dung cong dan ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - anh bang va dung cong dan ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - anh bang va dung cong dan ((toan cao) or (toan ban))*.