Perhaps you should try some spelling variations:
trinh quang » tinh quang, trinh quan, tranh quang
theo chieu » theo tieu, theo chu, thi chieu
canh trinh » canh tranh, hanh trinh, canh tinh
quang dung » quang trung, ung dung, cuong dung
ho chieu » hoc thieu, doi chieu, mot chieu
cong san » cong tac
chan cau » phan cau, can cau, chinh cau

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 (theo chieu)) xanh - canh trinh quang dung ((cong dong) or (cong san)) chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chieu)) xanh - canh trinh quang dung ((cong dong) OR (cong san)) chan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (theo chieu)) xanh - canh trinh quang dung ((cong dong) or (cong san)) chan cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (theo chieu)) xanh - canh trinh quang dung ((cong dong) or (cong san)) chan cau*.