Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hieu cua » hieu qua, dieu cua, bieu cua
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
xang xa » lang xa, mang xa, ang xa
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
vai cua » dai cua, hai cua, lai cua
vi cua » di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (thuoc sach)) ty xang xa hoi. hieu cua cac xuc van hanh ((vi cua) or (vai cua)) su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thuoc sach)) ty xang xa hoi. hieu cua cac xuc van hanh ((vi cua) OR (vai cua)) su.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thuoc sach)) ty xang xa hoi. hieu cua cac xuc van hanh ((vi cua) or (vai cua)) su*.