Perhaps you should try some spelling variations:
tay quang » tac quang, tai quang, tao quang
quang xa » quan xa, quang ma, quang va
qua cham » qua hai, qua cac, va cham
thanh ve » hanh ve, thanh va, thanh vien
so sach » bo sach, co sach, hoc sach
so sanh » do sanh
xac va » tac va, ac va, bac va
ve luu » ke luu, vi luu
tru » truc

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) OR (so sanh)) tay quang xa hoi. hieu qua cham ((xac va) or (duc va)) thanh ve luu tru~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) tay quang xa hoi. hieu qua cham ((xac va) OR (duc va)) thanh ve luu tru.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (so sanh)) tay quang xa hoi. hieu qua cham ((xac va) or (duc va)) thanh ve luu tru".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (so sanh)) tay quang xa hoi. hieu qua cham ((xac va) or (duc va)) thanh ve luu tru*.