Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
dong vai » dong tai, dong va, dong vat
viec cac » vien cac, viec cua, viec lam
lang van » dang van, tang van, hoang van
sach ky » sac ky, sach y, sach ty
vai cuu » vai cua
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay
cuu tre » cua tre, cau tren, cau treo
lo 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 xa) OR (lang van)) hoi. nhieu viec cac ((lo van) OR (le van)) dong vai cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((lang xa) OR (lang van)) hoi. nhieu viec cac ((lo van) or (le van)) dong vai cuu tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((lang xa) OR (lang van)) hoi. nhieu viec cac ((lo van) or (le van)) dong vai cuu tre*.