Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach thu » sach thue, sach thieu, sach tham
tinh tri » dinh tri, minh tri, chinh tri
chat xuc » chat huu, cam xuc, chao xu
chat tuc » luat tuc, chat huu, chat cua
va tinh » may tinh
hieu va » lieu va, hieu qua
nang xa » lang xa, nang ma, mang xa
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 thu ((nang xa) or (nang x)) hoi. hieu va ((chat tuc) OR (chat xuc)) va tinh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach thu ((nang xa) OR (nang x)) hoi. hieu va ((chat tuc) OR (chat xuc)) va tinh tri cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach thu ((nang xa) or (nang x)) hoi. hieu va ((chat tuc) OR (chat xuc)) va tinh tri cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach thu ((nang xa) or (nang x)) hoi. hieu va ((chat tuc) OR (chat xuc)) va tinh tri cua tre*.