Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hoc sach » hoc sinh, hoc cac, hoc anh
hang cao » hoang cao, nang cao, hang ca
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
tham xuc » tham nuoc, tham thuc, pham duc
sach ty » sach y, sach tu, sach thu
ty hang » ly hang, ty xang, thi hang
cao hoi » cau hoi, co hoi, cao hoc
va tinh » may tinh
lap cua » lai cua, tap cua, lam cua
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ty hang cao hoi. hieu van tham xuc ((va tinh) or (ban thanh)) lap cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ty hang cao hoi. hieu van tham xuc ((va tinh) OR (ban thanh)) lap cua tre.
• Adding a wildcard symbol may retrieve word variants: hoc sach ty hang cao hoi. hieu van tham xuc ((va tinh) or (ban thanh)) lap cua tre*.