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
dinh vai » dinh vi, dinh va, dinh tai
te sach » toc sach
luan va » luan van, luat va
y nang » ly nang, v nang, may nang
cua tu » cua tuc, cua su, cua cu

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 ((y nang) OR (ky nang)) xa hoi. hieu vien bai luan va ((dinh vai) or (dinh van)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y nang) OR (ky nang)) xa hoi. hieu vien bai luan va ((dinh vai) OR (dinh van)) cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y nang) OR (ky nang)) xa hoi. hieu vien bai luan va ((dinh vai) or (dinh van)) cua tu".
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) OR (ky nang)) xa hoi. hieu vien bai luan va ((dinh vai) or (dinh van)) cua tu*.