Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
nam xua » nam cua, nam mua, nam qua
xua ban » xuat ban, cua ban, qua ban
cua tre » cua te, cuu tre, cua triet
ty ang » ty xang, ty hang, ty anh
ang xa » lang xa, mang xa, dang xay
cua tu » cua tuc, cua su, cua cu

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: tu sach ty ang xa hoi. hieu van nam xua ban hanh vi ((cua tre) OR (cua tu))~.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ang xa hoi. hieu van nam xua ban hanh vi ((cua tre) or (cua tu))*.