Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
cong thanh » dong thanh, cong trinh, cong tan
hoc thieu » toc thieu, hoc hien
doi chieu » doc hieu, doi chi, ho chieu
trinh va » trinh van, trinh vat, trinh ve
cong san » cong tac
van dau » van dao, phan dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thieu) or (doi chieu)) xanh - canh trinh va nhung ((cong thanh) or (cong san)) van dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (doi chieu)) xanh - canh trinh va nhung ((cong thanh) OR (cong san)) van dau.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (doi chieu)) xanh - canh trinh va nhung ((cong thanh) or (cong san)) van dau*.