Perhaps you should try some spelling variations:
chinh cua » chinh ca, chinh sua, hinh cua
hieu cach » chieu sach, hieu ca, biet cach
cong cong » cong dong, trong cong, dung cong
hieu cac » hieu luc, hieu va, hieu van
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) OR (hieu cac)) - 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) OR (hieu cac)) - hanh chinh cua cong cong san ((toan tai) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu cach) OR (hieu cac)) - hanh chinh cua cong cong san ((toan tai) or (toan tap))".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu cach) OR (hieu cac)) - hanh chinh cua cong cong san ((toan tai) or (toan tap))*.