Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
dang xay » dang van, van xay
viec cam » viec lam, viec cua, viec va
tinh dai » trinh dai, tinh da, tinh hai
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, lang van
xuc may » xuc hay, truc may, phuc may
cua tre » cua te, cuu tre, cua triet

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky ((nang xa) or (((lang xa) or (dang xay)))) hoi. nhieu viec cam xuc may tinh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky ((nang xa) OR (((lang xa) OR (dang xay)))) hoi. nhieu viec cam xuc may tinh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach ky ((nang xa) or (((lang xa) or (dang xay)))) hoi. nhieu viec cam xuc may tinh dai cua tre*.