Perhaps you should try some spelling variations:
chinh thuat » chinh phat, chien thuat, chinh thuc
thuat hung » thuat dung, thuat ung, thuat xung
hieu sang » chieu sang, hieu lang, hieu quang
hung cong » nhung cong, hung cuong, phung cong
doc hieu » toc thieu, hoc thieu, hoc hien
cong san » cong tac
toan cau » toan ban, toan tap
toan tai » toan tap, doanh tai, toan ban
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sang - hanh chinh thuat hung cong san ((((toan cau) OR (toan tai))) OR (toan cao))~.
• Adding a wildcard symbol may retrieve word variants: doc hieu sang - hanh chinh thuat hung cong san ((((toan cau) or (toan tai))) or (toan cao))*.