Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
sach hay » sach han, sach ha, sach nay
hay lang » ha lang, tay lang, nhan lang
hieu thi » sieu thi, hieu chi, hiep thi
thi chat » thi cham, tri chat, thi chap
lang xa » lang ha, dang xay, lang van
duc ban » duc tan, dua ban, duc man
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
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: hoc sach hay lang xa hoi. hieu thi chat ((duc ban) or (duc van)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach hay lang xa hoi. hieu thi chat ((duc ban) OR (duc van)) hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: hoc sach hay lang xa hoi. hieu thi chat ((duc ban) or (duc van)) hanh vi cua tre*.