Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
chieu xanh » chieu sach, chieu sang, chieu tinh
nhung cong » dung cong, thong cong, nhung don
dang thanh » dong thanh, dang hanh, hoang thanh
hieu manh » hieu nganh, dieu hanh, hien hanh
trinh van » trinh han, trinh quan, trinh toan
hang cong » dang cong, hang nong, bang cong
thanh cac » hanh cac, thanh bac, thanh ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) or (chieu xanh)) - canh trinh van ((nhung cong) OR (hang cong)) dang thanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu xanh)) - canh trinh van ((nhung cong) OR (hang cong)) dang thanh cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (chieu xanh)) - canh trinh van ((nhung cong) OR (hang cong)) dang thanh cac".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu xanh)) - canh trinh van ((nhung cong) OR (hang cong)) dang thanh cac*.