Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
thuc cao » thuoc cao, thuc co, thuc can
dan thuc » dan toc, am thuc
viec dan » viec dang, viec ban, viec dat
vai cua » dai cua, hai cua, lai cua
sach tu » sach thu, cach tu, sach ty
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
vi 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: te sach tu ((nang xa) or (nang ma)) hoi. nhieu viec dan thuc cao dang ((vi cua) OR (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu ((nang xa) OR (nang ma)) hoi. nhieu viec dan thuc cao dang ((vi cua) OR (vai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu ((nang xa) or (nang ma)) hoi. nhieu viec dan thuc cao dang ((vi cua) OR (vai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach tu ((nang xa) or (nang ma)) hoi. nhieu viec dan thuc cao dang ((vi cua) OR (vai cua)) tre*.