Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien vay » vien va, vien xay, vien may
vay luan » ly luan, von luan, bai luan
dinh vai » dinh vi, dinh va, dinh tai
te sach » toc sach
nang xa » nang x, lang xa, nang ma
luan va » luan van, luat va
y nang » ky nang, ly nang, v 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 xa hoi. hieu vien vay 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 xa hoi. hieu vien vay luan va ((dinh vai) OR (dinh van)) cua tu.
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. hieu vien vay luan va ((dinh vai) or (dinh van)) cua tu*.