Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
viec ban » viec lam, viec va, viec tai
ban thuc » ban thuoc, dan thuc, van thuc
thuc co » tuc co, thuat co, thuc cua
sach ty » sach y, sach tu, sach thu
te sach » toc sach
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
cua tre » cua te, cuu tre, cua triet
dan vi » doan vi, dan va, gan vi

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