Perhaps you should try some spelling variations:
hieu cach » hieu cac, chieu sach, hieu ca
chinh cua » chinh ca, chinh sua, hinh cua
cong cong » cong dong, trong cong, dung cong
hoc hieu » hoc thieu, hoc hien, doc hieu
cong san » cong tac
toan tai » doanh tai, toan ban, toan cao
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 cach - hanh chinh cua cong cong san ((toan tai) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu cach - hanh chinh cua cong cong san ((toan tai) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu cach - hanh chinh cua cong cong san ((toan tai) or (toan tap))*.