Perhaps you should try some spelling variations:
bieu hieu » bieu hien, tieu bieu, bien kieu
cua triet » cua viet, su triet, va triet
hieu cac » hieu luc, hieu va, hieu van
te sach » toc sach
nang xa » nang x, lang xa, nang ma
cac lao » ca lao, cac loai, cac giao
lao van » dao van, cao van, lo van
cua tre » cua te, cuu tre, dua tren
y nang » ky nang, ly nang, v nang

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: te sach y nang xa hoi. bieu hieu cac lao van (dich OR dinh) vu ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang xa hoi. bieu hieu cac lao van (dich OR dinh) vu ((cua tre) or (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. bieu hieu cac lao van (dich OR dinh) vu ((cua tre) or (cua triet))*.