Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, kieu tinh
hanh trinh » hanh chinh
chau tinh » cuu tinh, ha tinh, cua tinh
xuat tong » xuat thong, xuat tuong, xuat cong
tong cong » trong cong, cong cong, dung cong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu tinh) OR (chau tinh)) - ((hanh trinh) or (canh tranh)) xuat tong cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu tinh) OR (chau tinh)) - ((hanh trinh) OR (canh tranh)) xuat tong cong san toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu tinh) OR (chau tinh)) - ((hanh trinh) or (canh tranh)) xuat tong cong san toan ban".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu tinh) OR (chau tinh)) - ((hanh trinh) or (canh tranh)) xuat tong cong san toan ban*.