Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien bai » vien dai, vien tai, vien bach
bai luan » bai toan, li luan, vay luan
te sach » toc sach
va kinh » va tinh, qua kinh
lai cua » dai cua, hai cua, lai chau
vai cua » dai cua, hai cua, bai cua
va dinh » van dinh, va tinh, vu dinh
nang xa » nang x, lang xa, nang ma
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. hieu vien bai luan ((va dinh) OR (va kinh)) ((vai cua) OR (lai cua)) tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang xa hoi. hieu vien bai luan ((va dinh) OR (va kinh)) ((vai cua) or (lai cua)) tu~".
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. hieu vien bai luan ((va dinh) OR (va kinh)) ((vai cua) or (lai cua)) tu*.