Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
cua triet » cua viet, su triet, va triet
dan thuc » dan toc, am thuc
viec dan » viec dang, viec ban, viec dat
nang xa » lang xa, nang ma, mang xa
thuc co » tuc co, thuat co, thuc cua
cua tre » cua te, cuu tre, dua tren
te sach » toc sach
co dan » co ban, ca dan, cao dang
dan vi » doan vi, don vi, dan va

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 thieu ((nang xa) or (nang x)) hoi. nhieu viec dan thuc co dan vi ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thieu ((nang xa) OR (nang x)) hoi. nhieu viec dan thuc co dan vi ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach thieu ((nang xa) or (nang x)) hoi. nhieu viec dan thuc co dan vi ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: te sach thieu ((nang xa) or (nang x)) hoi. nhieu viec dan thuc co dan vi ((cua tre) OR (cua triet))*.