Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
thieu xanh » chieu xanh, thien anh, thien danh
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
trinh van » trinh han, trinh quan, trinh toan
van nhung » van nhuong, va nhung, van hung
cong lang » cong vang, cong luong, cong quang
thanh cao » thanh cac, thanh thao, thanh cham
thanh ca » thanh cha, thanh cac, thanh ha

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 xanh) or (hieu manh)) - canh trinh van nhung cong lang ((thanh cao) OR (thanh ca))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - canh trinh van nhung cong lang ((thanh cao) OR (thanh ca)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (hieu manh)) - canh trinh van nhung cong lang ((thanh cao) OR (thanh ca))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (hieu manh)) - canh trinh van nhung cong lang ((thanh cao) OR (thanh ca))*.