Perhaps you should try some spelling variations:
doanh cua » doanh luan
ban thanh » ban hanh, ban hang
qua cham » qua hai, qua cac, va cham
cham cuu » cap cuu, chat cua
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
cuu ban » cuu van, cua ban, cuu san
vi luu » vi lua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty xang xa hoi. hieu qua cham cuu ban thanh ((vi luu) or (doanh cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty xang xa hoi. hieu qua cham cuu ban thanh ((vi luu) OR (doanh cua)) tre.
• Adding a wildcard symbol may retrieve word variants: su sach ty xang xa hoi. hieu qua cham cuu ban thanh ((vi luu) or (doanh cua)) tre*.