Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
viec cac » vien cac, viec cua, viec lam
dong vai » dong tai, dong va, dong vat
tu sach » thu sach, su sach, te sach
ky lang » ky nang, ky dang, tay lang
ky tang » ky nang, ky dang, kho tang
cao van » cac van, dao van, cao dang
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
co van » vo van, so van, do van

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: tu sach ((ky lang) OR (ky tang)) xa hoi. nhieu viec cac ((co van) OR (cao van)) dong vai cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky lang) or (ky tang)) xa hoi. nhieu viec cac ((co van) OR (cao van)) dong vai cuu tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky lang) or (ky tang)) xa hoi. nhieu viec cac ((co van) OR (cao van)) dong vai cuu tre*.