Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh va » thanh van, hanh va, thanh ha
chat xuc » chat huu, chao xu, chat cua
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
hieu vu » hieu va, hieu ve, hieu su
lang xa » lang ha, dang xay, lang van
nang ma » tang ma, sang ma, nang cao
va cua » va chua, via cua, ca 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 ((nang ma) or (lang xa)) hoi. hieu vu ((cam xuc) or (chat xuc)) van thanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky ((nang ma) OR (lang xa)) hoi. hieu vu ((cam xuc) OR (chat xuc)) van thanh va cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach ky ((nang ma) or (lang xa)) hoi. hieu vu ((cam xuc) or (chat xuc)) van thanh va cua tre*.