Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
trinh vat » trinh van, trinh luat, sinh vat
tong cong » trong cong, cong cong, dung cong
cua tinh » va tinh, ha tinh, hoa tinh
cua sinh » hoa sinh, va sinh
vat tong » vat trong, va tong, vat dong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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 vat tong cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: moc ((cua tinh) OR (cua sinh)) - canh trinh vat tong cong dan than cau.
• Adding a wildcard symbol may retrieve word variants: moc ((cua tinh) or (cua sinh)) - canh trinh vat tong cong dan than cau*.