Perhaps you should try some spelling variations:
dang xay » dang van, van xay
tinh tri » dinh tri, minh tri, chinh tri
su sach » vu sach
va tinh » may tinh
cam tuc » cam xuc, cam tu, nam thuc
hieu ve » hieu va, hieu van
lang xa » lang ha, lang van
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) y ((lang xa) OR (dang xay)) hoi. hieu ve cam tuc va tinh tri cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) y ((lang xa) OR (dang xay)) hoi. hieu ve cam tuc va tinh tri cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) y ((lang xa) OR (dang xay)) hoi. hieu ve cam tuc va tinh tri cua tre*.