Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
cong cong » cong dong, trong cong, dang cong
dung cong » dung trong
cua tinh » va tinh, ha tinh, hoa tinh
cua sinh » hoa sinh, va sinh
trinh va » trinh van, trinh vat, trinh ve
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: moc ((cua tinh) or (cua sinh)) - canh trinh va ((cong cong) OR (dung cong)) dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: moc ((cua tinh) OR (cua sinh)) - canh trinh va ((cong cong) OR (dung cong)) dan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "moc ((cua tinh) or (cua sinh)) - canh trinh va ((cong cong) OR (dung cong)) dan toan cau".
• Adding a wildcard symbol may retrieve word variants: moc ((cua tinh) or (cua sinh)) - canh trinh va ((cong cong) OR (dung cong)) dan toan cau*.