Perhaps you should try some spelling variations:
thiet yeu » thiet ke, theo yeu
hanh mang » nhanh mang, hanh trang, nhanh lang
dung cong » dung trong
cong dan » cong san, cong tan, huong dan
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban
mang va » mang vua, hang va, bang va
va dung » van dung, va duong, vat dung

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: ((thiet yeu) OR (theo tieu)) tinh - hanh mang va dung cong dan ((toan cau) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thiet yeu) or (theo tieu)) tinh - hanh mang va dung cong dan ((toan cau) OR (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: ((thiet yeu) or (theo tieu)) tinh - hanh mang va dung cong dan ((toan cau) OR (toan tap))*.