Perhaps you should try some spelling variations:
ban hang » ngan hang
chat xuc » chat huu, chao xu, chat cua
tang van » dang van, hoang van, trong van
tu sach » thu sach, su sach, te sach
hang vi » hang va, hanh vi, hang di
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
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: tu sach ty ((nang ma) or (tang van)) hoi. hieu ve ((chat xuc) OR (cam xuc)) ban hang vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang ma) OR (tang van)) hoi. hieu ve ((chat xuc) OR (cam xuc)) ban hang vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang ma) or (tang van)) hoi. hieu ve ((chat xuc) OR (cam xuc)) ban hang vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang ma) or (tang van)) hoi. hieu ve ((chat xuc) OR (cam xuc)) ban hang vi cua tre*.