Perhaps you should try some spelling variations:
chinh cua » chinh ca, chinh sua, hinh cua
hieu luch » hieu luat, hieu cach, hieu tuc
cong cong » cong dong, trong cong, dung cong
hieu luc » hieu luat, hieu qua
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 luch) OR (hieu luc)) - 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 luch) OR (hieu luc)) - hanh chinh cua cong cong san ((toan tai) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu luch) OR (hieu luc)) - hanh chinh cua cong cong san ((toan tai) OR (toan tap))*.