Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
mang thong » mang trong, dang thuong, nang thuong
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cau » toan cau, phan cau, than cap
ho chau » ha chau, o chau, khoa chau
ho chu » hoi chu, cho chu, ho chua

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

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