Perhaps you should try some spelling variations:
tinh moi » tinh doi, sinh moi, tinh mo
dinh moi » dinh so, dinh tri, dinh thi
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
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 qua)) cam luc va ((tinh moi) OR (dinh moi)) 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 qua)) cam luc va ((tinh moi) OR (dinh moi)) 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 qua)) cam luc va ((tinh moi) OR (dinh moi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x hoi. ((hieu ve) or (hieu qua)) cam luc va ((tinh moi) OR (dinh moi)) cua tre*.