Perhaps you should try some spelling variations:
dang xay » dang van, van xay
toc sach » hoc sach, doc sach, thuoc sach
ban hang » ngan hang
hieu van » hieu va, thien van, lieu va
hang vi » hang va, hanh vi, hang di
xuc ban » duc ban, cuc ban, quoc ban
nam xuc » cam xuc, nam xua, nam thuc
lang ha » long ha
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: ((te sach) OR (toc sach)) ky ((lang ha) or (dang xay)) hoi. hieu van nam xuc ban hang vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky ((lang ha) OR (dang xay)) hoi. hieu van nam xuc ban hang vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ky ((lang ha) or (dang xay)) hoi. hieu van nam xuc ban hang vi cua tre*".