Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
trinh vat » trinh van, trinh luat, sinh vat
vat thong » va thong, vat trong, mat thong
cong san » cong tac
than cau » toan cau, phan cau, than cap
ha tinh » va tinh, may tinh
ho ha » pho ha, ho hap, o ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ha tinh - canh trinh vat thong ((cong ty) or (cong san)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ha tinh - canh trinh vat thong ((cong ty) OR (cong san)) than cau.
• Adding a wildcard symbol may retrieve word variants: ho ha tinh - canh trinh vat thong ((cong ty) or (cong san)) than cau*.