Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh di » thanh doi, thanh de, thanh do
sach thu » sach thue, sach thieu, sach tham
dang xay » dang van, van xay
cuc ban » cua ban, cac ban, cuu ban
cam cuc » cam xuc, cham cuu, pham cuc
hieu ve » hieu va, hieu van
xay hoi » xa hoi, tay hoi, cay phoi
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
sac ky » cac ky, sai ky
di cua » dai cua, doi cua, de cua

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 y) or (sach thu))) or (sac ky)) dang xay hoi. hieu ve cam cuc ban thanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((((sach y) OR (sach thu))) OR (sac ky)) dang xay hoi. hieu ve cam cuc ban thanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((((sach y) or (sach thu))) or (sac ky)) dang xay hoi. hieu ve cam cuc ban thanh di cua tre*.