Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
doc sach » hoc sach, toc sach, dac sac
chat xuc » chat huu, cam xuc, chao xu
van hanh » van thanh, ban hanh, van anh
cua tre » cua te, cua triet, dua tren
xuc van » duc van, luc van, vuc van
va chat » van chat, va phat, cao chat
hieu va » lieu va, hieu qua
xang xa » lang xa, mang xa, ang xa
cuu tre » cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc sach) or (nuoc sach)) ty xang xa hoi. hieu va chat xuc van hanh vi ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc sach) OR (nuoc sach)) ty xang xa hoi. hieu va chat xuc van hanh vi ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc sach) or (nuoc sach)) ty xang xa hoi. hieu va chat xuc van hanh vi ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: ((doc sach) or (nuoc sach)) ty xang xa hoi. hieu va chat xuc van hanh vi ((cua tre) OR (cuu tre))*.