Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach tay » xach tay, sach hay, sach nay
tay lang » tai lang, tay tang, tay quang
lang xa » lang ha, dang xay, lang van
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
ve cac » va cac, vien cac
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua

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 tay lang xa hoi. hieu ((va cam) or (ve cac)) tuc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach tay lang xa hoi. hieu ((va cam) OR (ve cac)) tuc va hanh vi cua tre*.