Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
trinh thuc » trinh tu, trinh thi
thuc chung » thuc cung, thuc nhung, thung chung
hien tinh » khien tinh, thien tinh, bien tinh
cong tac » cong ty
toan cau » toan cao, toan ban, toan tai
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 hien tinh - canh trinh thuc chung ((cong san) or (cong tac)) ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien tinh - canh trinh thuc chung ((cong san) OR (cong tac)) ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc hien tinh - canh trinh thuc chung ((cong san) or (cong tac)) ((toan cau) or (toan tap))*.