Perhaps you should try some spelling variations:
hieu vien » hieu viec, thieu nien, hieu tieng
hieu hien » bieu hien, dieu hien, chieu chien
dinh vai » dinh van, dinh vi, dinh va
luat ve » luat viet
vai cua » dai cua, hai cua, lai cua
te sach » toc sach
nang xa » nang x, lang xa, nang ma
luat va » xuat va, suat va, luan va
y nang » ky nang, ly nang, v nang
cua cu » cua chu, cua cau, cua su

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. ((hieu vien) OR (hieu hien)) dai ((luat va) OR (luat ve)) dinh vai cua cu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang xa hoi. ((hieu vien) or (hieu hien)) dai ((luat va) OR (luat ve)) dinh vai cua cu~".
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. ((hieu vien) or (hieu hien)) dai ((luat va) OR (luat ve)) dinh vai cua cu*.