Perhaps you should try some spelling variations:
ban thanh » ban hang
ban hanh » ban hang
ban danh » ban doanh, ban dan, van danh
tham xuc » tham nuoc, tham thuc, pham duc
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
va tham » van tham, va cham, va thanh
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
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 ky lang xa hoi. hieu va tham xuc ((((ban hanh) or (ban thanh))) or (ban danh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang xa hoi. hieu va tham xuc ((((ban hanh) OR (ban thanh))) OR (ban danh)) vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang xa hoi. hieu va tham xuc ((((ban hanh) or (ban thanh))) or (ban danh)) vi cua tre*.