Perhaps you should try some spelling variations:
canh trang » canh tranh, banh trang, thanh trang
hanh trang » thanh trung, canh tranh, hanh trinh
thong cong » trong cong, tong cong, thong thong
chau tinh » cuu tinh, ha tinh, cac tinh
cua tinh » cua sinh, va tinh, ha tinh
va thong » va thuong, va phuong, he thong
cong san » cong tac
san toan » van toan, dan toan, 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: o ((chau tinh) or (cua tinh)) - ((canh trang) OR (hanh trang)) va thong cong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: o ((chau tinh) OR (cua tinh)) - ((canh trang) OR (hanh trang)) va thong cong san toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "o ((chau tinh) or (cua tinh)) - ((canh trang) OR (hanh trang)) va thong cong san toan cau".
• Adding a wildcard symbol may retrieve word variants: o ((chau tinh) or (cua tinh)) - ((canh trang) OR (hanh trang)) va thong cong san toan cau*.