Perhaps you should try some spelling variations:
dinh moi » dinh so, dinh thi
dinh tri » chinh tri
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu van
hieu va » lieu va, hieu qua
cam luc » cam xuc, cau luc
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang x hoi. ((hieu ve) or (hieu va)) cam luc va ((dinh moi) OR (dinh tri)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang x hoi. ((hieu ve) OR (hieu va)) cam luc va ((dinh moi) OR (dinh tri)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang x hoi. ((hieu ve) or (hieu va)) cam luc va ((dinh moi) OR (dinh tri)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x hoi. ((hieu ve) or (hieu va)) cam luc va ((dinh moi) OR (dinh tri)) cua tre*.