Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
van cau » van dau, van hau, van chat
xang xa » lang xa, mang xa, ang xa
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu ((xang xa) OR (mang may)) hoi. hieu van cau ((xuc va) OR (tuc va)) hanh vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thu ((xang xa) or (mang may)) hoi. hieu van cau ((xuc va) OR (tuc va)) hanh vi cua te~".
• Adding a wildcard symbol may retrieve word variants: su sach thu ((xang xa) or (mang may)) hoi. hieu van cau ((xuc va) OR (tuc va)) hanh vi cua te*.