Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty hang » ly hang, ty xang, thi hang
hang xa » hoang xa, hang va, hang ca
van cam » van nam, van lam, van cau
truc va » thuc va, thuc vat, trung va
xuc va » duc va, tuc va, luc va
cua te » cua tu
cua su » qua su

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 ty hang xa hoi. hieu van cam ((xuc va) OR (truc va)) hanh vi ((cua te) OR (cua su))~.
• Adding a wildcard symbol may retrieve word variants: su sach ty hang xa hoi. hieu van cam ((xuc va) or (truc va)) hanh vi ((cua te) or (cua su))*.