Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
thu sach » tu sach, thuat sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
sach ky » sac ky, sach y, sach ty
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
cao hoi » co hoi, cao hoc, tao hoi
vu cam » vu cham, vu cao, tu cam
va cam » va cham, va cac, va cao
lo va » lo van, lao va, ly va

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 ky nang ((cao hoi) OR (cau hoi)). hieu ((vu cam) or (va cam)) lo va thanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ((cao hoi) OR (cau hoi)). hieu ((vu cam) OR (va cam)) lo va thanh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang ((cao hoi) OR (cau hoi)). hieu ((vu cam) or (va cam)) lo va thanh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ((cao hoi) OR (cau hoi)). hieu ((vu cam) or (va cam)) lo va thanh hai cua tre*.