Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
viec dao » viec bao, viec dat, viet dao
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
dao tuc » dao duc
va dao » ca dao
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky lang xa hoi. nhieu viec dao tuc ((va dau) OR (va dao)) vi cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky lang xa hoi. nhieu viec dao tuc ((va dau) OR (va dao)) vi cua triet".
• Adding a wildcard symbol may retrieve word variants: toc sach ky lang xa hoi. nhieu viec dao tuc ((va dau) OR (va dao)) vi cua triet*.