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 » toan cau, phan cau, than cap
phan dau » phan tu, hang dau
va tong » va thong, va tuong, va trong
moc ha » hoc ha, coc ha, moc chau
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: ((moc ha) OR (toc ha)) tinh - canh trinh va tong cong dan ((than cau) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((moc ha) OR (toc ha)) tinh - canh trinh va tong cong dan ((than cau) OR (phan dau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((moc ha) OR (toc ha)) tinh - canh trinh va tong cong dan ((than cau) or (phan dau))".
• Adding a wildcard symbol may retrieve word variants: ((moc ha) OR (toc ha)) tinh - canh trinh va tong cong dan ((than cau) or (phan dau))*.