Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
canh trinh » canh tranh, hanh trinh, canh tinh
moc chau » toc cham
hoc chat » hoc phat, hoc cao, hoc phan
trinh va » trinh van, trinh vat, trinh ve
cong dan » cong san, cong tan, huong dan
chan cau » phan cau, chinh cau, nhanh cau
can cau » van cau, ban cau, ca cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((moc chau) OR (hoc chat)) tinh - canh trinh va thuong cong dan ((chan cau) or (can cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((moc chau) OR (hoc chat)) tinh - canh trinh va thuong cong dan ((chan cau) OR (can cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((moc chau) OR (hoc chat)) tinh - canh trinh va thuong cong dan ((chan cau) or (can cau))".
• Adding a wildcard symbol may retrieve word variants: ((moc chau) OR (hoc chat)) tinh - canh trinh va thuong cong dan ((chan cau) or (can cau))*.