Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dinh dat » dinh ket, dinh van, dinh lam
chat xuc » chat huu, cam xuc, chat cua
hieu van » hieu va, thien van, lieu va
lang xa » lang ha, dang xay, lang van
va dinh » van dinh, va kinh, va tinh
nang xa » nang x, nang ma, mang xa
dat cua » dai cua, day cua, mat cua
cua tre » cua te, cuu tre, cua triet

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 y ((nang xa) or (lang xa)) hoi. hieu van ((chat xuc) OR (chao xu)) va dinh dat cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((nang xa) OR (lang xa)) hoi. hieu van ((chat xuc) OR (chao xu)) va dinh dat cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y ((nang xa) or (lang xa)) hoi. hieu van ((chat xuc) OR (chao xu)) va dinh dat cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach y ((nang xa) or (lang xa)) hoi. hieu van ((chat xuc) OR (chao xu)) va dinh dat cua tre*.