Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dinh dien » tinh dien, kinh dien, dich dien
cua tre » cua te, cuu tre, dua tren
te sach » toc sach
sach va » sach xa, sach ha, sach dao
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
va nang » van nang, da nang, cam nang
doc va » duoc va, duc va, loc va

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 va nang xa hoi. hieu ve cham ((hoc va) or (doc va)) dinh dien ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach va nang xa hoi. hieu ve cham ((hoc va) OR (doc va)) dinh dien ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach va nang xa hoi. hieu ve cham ((hoc va) or (doc va)) dinh dien ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: te sach va nang xa hoi. hieu ve cham ((hoc va) or (doc va)) dinh dien ((cua tre) OR (cua triet))*.