Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
tong cong » trong cong, cong cong, dung cong
chinh can » chinh ca, chinh ban, chinh cau
trinh va » trinh van, trinh vat, trinh ve
cong dan » cong san, cong tan, huong dan
chan cau » phan cau, can cau, chinh cau
va sinh » va kinh, va tinh, vi sinh
va tong » va thong, va tuong, va trong
ho va » ho van, nho va, tho va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho va sinh - canh trinh va tong cong dan ((chan cau) or (chinh can))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho va sinh - canh trinh va tong cong dan ((chan cau) OR (chinh can))*.