Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
toc sach » hoc sach, doc sach, thuoc sach
ban banh » ban hanh, ban danh, ban thanh
cham cua » chat cua, cham cuu, ham cua
ve cham » va cham, ve chat, vu cham
ban anh » ban hanh, ban danh, bang anh
hieu ve » hieu va, hieu van
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
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: ((thu sach) or (toc sach)) ky dang xa hoi. hieu ve cham cua ((ban anh) OR (ban banh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (toc sach)) ky dang xa hoi. hieu ve cham cua ((ban anh) OR (ban banh)) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (toc sach)) ky dang xa hoi. hieu ve cham cua ((ban anh) OR (ban banh)) vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (toc sach)) ky dang xa hoi. hieu ve cham cua ((ban anh) OR (ban banh)) vi cua tre*.