Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh de » hanh de, thanh ve, thanh do
chat vuc » chat xuc, chat va, chat huu
so sach » so sanh, bo sach, co sach
vuc van » duc van, luc van, thuc van
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
dang ha » dong ha, dung ha, tang ha
lang ha » long ha
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: so sach ky ((dang ha) OR (lang ha)) hoi. ((hieu ve) or (hieu qua)) chat vuc van thanh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky ((dang ha) OR (lang ha)) hoi. ((hieu ve) OR (hieu qua)) chat vuc van thanh de cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky ((dang ha) OR (lang ha)) hoi. ((hieu ve) or (hieu qua)) chat vuc van thanh de cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach ky ((dang ha) OR (lang ha)) hoi. ((hieu ve) or (hieu qua)) chat vuc van thanh de cua tre*.