Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
dinh vai » dinh van, dinh vi, dinh va
dai luan » bai luan, dan luan, dat luan
viec dai » vien dai, viec tai, viec dat
vai cua » dai cua, hai cua, lai cua
va dinh » van dinh, va kinh, va tinh
luan va » luan van, luat va
te sach » toc sach
vu nang » vuc nang, va nang, vu dang
ly nang » ky nang, ly hang, ly vang
y nang » ky 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 (ly nang))) or (vu nang)) xa hoi. hieu viec dai luan va dinh vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((((y nang) OR (ly nang))) OR (vu nang)) xa hoi. hieu viec dai luan va dinh vai cua tu.
• Adding a wildcard symbol may retrieve word variants: te sach ((((y nang) or (ly nang))) or (vu nang)) xa hoi. hieu viec dai luan va dinh vai cua tu*.