Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
hanh trinh » canh tranh, hanh chinh
hang cong » dang cong, hang nong, bang cong
chao chu » cho chu, cua chu, cao cho
trinh ve » trinh he, trinh va, trinh vi
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
chu van » cuu 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 - hanh trinh ve ((nhung cong) OR (hang cong)) thanh ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: chao chu van - hanh trinh ve ((nhung cong) OR (hang cong)) thanh ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "chao chu van - hanh trinh ve ((nhung cong) OR (hang cong)) thanh ((toan cau) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: chao chu van - hanh trinh ve ((nhung cong) OR (hang cong)) thanh ((toan cau) or (toan ban))*.