Perhaps you should try some spelling variations:
chinh thiet » trinh thiet, chinh tien, chinh viet
hieu quang » thieu quang, hieu quan, hieu qua
thiet hung » thuyet hung, viet hung, hiep hung
hung cong » nhung cong, hung cuong, phung cong
hoc hieu » hoc thieu, hoc hien, doc hieu
cong dan » cong san, cong tan, huong dan
toan cao » toan ban
toan tap » toan ban

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 quang - hanh chinh thiet hung cong dan ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu quang - hanh chinh thiet hung cong dan ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu quang - hanh chinh thiet hung cong dan ((toan cao) or (toan tap))*.