Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
trinh quan » tinh quang, trinh luat, trinh han
doi chieu » doc hieu, doi chi, mot chieu
quan dong » quang dong, quan long, quan hoang
dong cong » duong cong, dung cong, dang cong
ho chieu » theo chieu, hoc thieu, mot chieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (doi chieu)) xanh - canh trinh quan dong cong ((hai quan) OR (tac quan)) ao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) xanh - canh trinh quan dong cong ((hai quan) OR (tac quan)) ao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (doi chieu)) xanh - canh trinh quan dong cong ((hai quan) OR (tac quan)) ao".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) xanh - canh trinh quan dong cong ((hai quan) OR (tac quan)) ao*.