Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
sach thu » sach thue, sach thieu, sach tham
vai cua » dai cua, hai cua, lai cua
van hac » van hoc, van ha, van hai
sach ty » sach y, sach tu, xach tay
xang xa » lang xa, mang xa, ang xa
xuc va » tuc va, luc va, xac va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ty) OR (sach thu)) xang xa hoi. hieu van hac ((xuc va) or (duc va)) hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach thu)) xang xa hoi. hieu van hac ((xuc va) OR (duc va)) hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) OR (sach thu)) xang xa hoi. hieu van hac ((xuc va) or (duc va)) hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) OR (sach thu)) xang xa hoi. hieu van hac ((xuc va) or (duc va)) hanh vai cua te*.