Perhaps you should try some spelling variations:
doc sach » hoc sach, nuoc sach, dac sac
cham xuc » cam xuc, chat xuc, cham soc
toc sach » hoc sach, thuoc sach, nuoc sach
dinh tai » dinh toai, dinh tri, dinh thi
dinh lai » dinh lam, dinh lap, dinh hai
xuc van » duc van, luc van, vuc van
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
o lang » hoa lang, hoi lang

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 (toc sach)) o lang xa hoi. hieu vu cham xuc van ((dinh lai) or (dinh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc sach) OR (toc sach)) o lang xa hoi. hieu vu cham xuc van ((dinh lai) OR (dinh tai)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc sach) OR (toc sach)) o lang xa hoi. hieu vu cham xuc van ((dinh lai) or (dinh tai)) cua tre*".