Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
so sach » so sanh, co sach, hoc sach
bo sach » co sach, hoc sach
xang xa » lang xa, mang xa, ang xa
hanh du » hanh dua, hanh tu, hanh de
va hanh » van hanh, va thanh, va danh
du cua » duy cua, dau cua, dum cua
xuc va » duc va, tuc va, luc va
cua te » cua tu
ve cac » va cac

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 (bo sach)) ty xang xa hoi. hieu ((ve cac) or (vien cac)) xuc va hanh du cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (bo sach)) ty xang xa hoi. hieu ((ve cac) OR (vien cac)) xuc va hanh du cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (bo sach)) ty xang xa hoi. hieu ((ve cac) or (vien cac)) xuc va hanh du cua te*".