Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
trinh luan » trinh luat, trinh quan, trinh han
phung cong » nhung cong, phong cong, nhung chong
chong cong » cong cong, thong cong, cuong cong
chau tinh » ha tinh, cua tinh, cac tinh
dan toan » van toan, dan than, 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: ho ((chau tinh) or (cuu tinh)) - canh trinh luan ((phung cong) or (chong cong)) dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chau tinh) OR (cuu tinh)) - canh trinh luan ((phung cong) OR (chong cong)) dan toan cau.
• Adding a wildcard symbol may retrieve word variants: ho ((chau tinh) or (cuu tinh)) - canh trinh luan ((phung cong) or (chong cong)) dan toan cau*.