Perhaps you should try some spelling variations:
thanh de » hanh de, thanh ve, thanh do
cuc ban » cua ban, cac ban, cuu ban
xuc ban » duc ban, quoc ban, xuat ban
sach ly » sach y, sach lo, sach ty
tu sach » thu sach, su sach, te sach
hieu va » lieu va
ly nang » ky nang, ly hang, ly vang
cua tre » cua te, cuu tre, cua triet
de cua » le cua, te cua, dieu 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 ly nang x ho. ((hieu va) OR (hieu qua)) chat ((xuc ban) or (cuc ban)) thanh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly nang x ho. ((hieu va) OR (hieu qua)) chat ((xuc ban) OR (cuc ban)) thanh de cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ly nang x ho. ((hieu va) OR (hieu qua)) chat ((xuc ban) or (cuc ban)) thanh de cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ly nang x ho. ((hieu va) OR (hieu qua)) chat ((xuc ban) or (cuc ban)) thanh de cua tre*.