Perhaps you should try some spelling variations:
nhiem trong » nghiep trong
chon nhiem » chon chien, hoi nhiem, phoi nhiem
hanh trang » thanh trung, canh tranh, hanh trinh
trang va » tran van, hang va
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: chon nhiem trong - hanh trang va nhung ((cong tan) OR (cong san)) ((toan cau) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "chon nhiem trong - hanh trang va nhung ((cong tan) or (cong san)) ((toan cau) OR (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: chon nhiem trong - hanh trang va nhung ((cong tan) or (cong san)) ((toan cau) OR (toan tap))*.