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