Perhaps you should try some spelling variations:
ban thanh » ban hanh
ban hang » ngan hang
cua tre » cua te, cua triet, dua tren
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
cuu tre » cau tren, cau treo
ve cam » ve cham, ve cac, va cam

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 ky tang xa hoi. hieu ve cam xuc ((ban thanh) or (ban hang)) tai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang xa hoi. hieu ve cam xuc ((ban thanh) OR (ban hang)) tai ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang xa hoi. hieu ve cam xuc ((ban thanh) or (ban hang)) tai ((cua tre) or (cuu tre))*.