Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trinh » canh tranh
hieu lang » chieu sang, hieu quang, nhieu tang
cua nhung » va nhung
toc hieu » toc thieu, doc hieu, hoc thieu
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, toan cau, ran cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc hieu lang - ((hanh trinh) or (hanh chinh)) cua nhung cong tan tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc hieu lang - ((hanh trinh) OR (hanh chinh)) cua nhung cong tan tran cau.
• Adding a wildcard symbol may retrieve word variants: toc hieu lang - ((hanh trinh) or (hanh chinh)) cua nhung cong tan tran cau*.