Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
tong cong » trong cong, cong cong, dung cong
trinh va » trinh van, trinh vat, trinh ve
cong dan » cong san, cong tan, huong dan
than cau » phan cau, than cap, thanh chau
toan cau » toan cao, toan ban, toan tap
phan dau » phan tu, hang dau
ha tinh » va tinh, may tinh
va tong » va thong, va tuong, va trong
toc ha » toc ta, hoc ha, tac ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ha tinh - canh trinh va tong cong dan ((((than cau) or (toan cau))) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ha tinh - canh trinh va tong cong dan ((((than cau) OR (toan cau))) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: toc ha tinh - canh trinh va tong cong dan ((((than cau) or (toan cau))) or (phan dau))*.