Perhaps you should try some spelling variations:
trinh cuong » trinh chuong, trinh cong, trinh huong
trinh duong » trinh dung, trinh phuong, dinh duong
theo chiet » theo chieu, thep thiet
chiet tach » chieu sach
dung cong » dung trong
cong san » cong tac
toan cau » toan ban, toan tap, toan tai
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: theo chiet tach - hanh ((trinh cuong) OR (trinh duong)) dung cong san ((toan cau) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chiet tach - hanh ((trinh cuong) OR (trinh duong)) dung cong san ((toan cau) or (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: theo chiet tach - hanh ((trinh cuong) OR (trinh duong)) dung cong san ((toan cau) or (toan cao))*.