Perhaps you should try some spelling variations:
sach khien » sach khuyen, sach thieu, sach tien
khien bang » phien ban, khien dong
dua tren » dung tren
su sach » so sach, vu sach
bang xa » lang xa, bang va, mang xa
lam xuc » cam xuc, lam duoc
va tinh » may tinh
tinh vi » trinh vi, tinh voi, tinh va
cuu tre » cua tre, cau tren, cau treo
va lam » van lam, va lap
xuc va » duc va, tuc va, luc va

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 khien bang xa hoi. lieu va lam xuc va tinh vi ((dua tren) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach khien bang xa hoi. lieu va lam xuc va tinh vi ((dua tren) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: su sach khien bang xa hoi. lieu va lam xuc va tinh vi ((dua tren) or (cuu tre))*.