Perhaps you should try some spelling variations:
trong thanh » truong thanh, trung thanh, rong thanh
tranh quang » tran quang, trinh quang, tinh quang
theo chieu » theo tieu, theo chu, thi chieu
quang dung » quang trung, ung dung, cuong dung
ho chieu » hoc thieu, doi chieu, mot chieu
phan cau » phan dau, phan tu, phan lap
phan cac » nhan cach, phan dau, phan lap

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