Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach ty » sach y, sach tu, sach thu
ty dang » ty xang, ky dang, ty hang
dang xa » dang xay, lang xa, dang ha
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cuc ban » cac ban, cuu ban, duc ban
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty dang xa hoi. hieu ve cham ((cuc ban) or (cua ban)) hanh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty dang xa hoi. hieu ve cham ((cuc ban) OR (cua ban)) hanh vi ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: thu sach ty dang xa hoi. hieu ve cham ((cuc ban) or (cua ban)) hanh vi ((cua tre) or (cuu tre))*.