Perhaps you should try some spelling variations:
tranh quang » tran quang, trinh quang, tinh quang
phuong dung » thong dung, phuong hoang
cuong dung » tuong duong, ung dung, thong dung
doi chieu » doc hieu, doi chi, mot chieu
dan thanh » dang thanh, danh thanh, ban thanh
thanh lap » thanh san, phan lap, thanh hai
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)) sach - canh tranh quang ((phuong dung) OR (cuong dung)) dan thanh lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) sach - canh tranh quang ((phuong dung) OR (cuong dung)) dan thanh lap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (doi chieu)) sach - canh tranh quang ((phuong dung) OR (cuong dung)) dan thanh lap".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) sach - canh tranh quang ((phuong dung) OR (cuong dung)) dan thanh lap*.