Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van dinh » van minh, van dich, va dinh
sach tu » sach thu, cach tu, sach ty
cua tre » cua te, cua triet, dua tren
dinh ve » dinh ket, dinh van
cuu tre » cau tren, cau treo
hieu ve » hieu va, hieu van
xang xa » lang xa, mang xa, ang xa
tu xang » ty xang, tu lang, tu quang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach tu xang xa hoi. hieu ve ((cau truc) or (cam xuc)) van dinh ve ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach tu xang xa hoi. hieu ve ((cau truc) OR (cam xuc)) van dinh ve ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: toc sach tu xang xa hoi. hieu ve ((cau truc) or (cam xuc)) van dinh ve ((cua tre) or (cuu tre))*.