Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trinh » canh tranh, hanh chinh
trinh va » trinh van, trinh vat, trinh ve
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
chu van » chu han

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

• Performing a fuzzy search may retrieve terms with similar spellings: chao ((chu van) OR (cuu van)) - hanh trinh va nhung cong tan ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: chao ((chu van) OR (cuu van)) - hanh trinh va nhung cong tan ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "chao ((chu van) OR (cuu van)) - hanh trinh va nhung cong tan ((toan cau) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: chao ((chu van) OR (cuu van)) - hanh trinh va nhung cong tan ((toan cau) or (toan ban))*.