Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
hoc thieu » toc thieu, hoc hien
tong cong » cong cong, dung cong, dang cong
van thanh » ban thanh, van tuan
thanh dat » thanh san, thanh hai, thanh van
ho chieu » theo chieu, doi chieu, mot chieu
trinh va » trinh van, trinh vat, trinh ve

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - canh trinh va ((tong cong) OR (trong cong)) van thanh dat~.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc thieu)) xanh - canh trinh va ((tong cong) or (trong cong)) van thanh dat*.