Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
thi hieu » thi chieu, thi hien, thi dieu
trinh va » trinh van, trinh vat, trinh ve
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo tieu) or (thi hieu)) xanh - hanh trinh va nhung cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo tieu) OR (thi hieu)) xanh - hanh trinh va nhung cong dan toan cau*.