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
sach thu » sach thue, sach thieu, sach tham
cau theo » cau thi, cau tao
sach ty » sach y, sach tu, xach tay
cao dan » cao dang, cao danh, cac dan
cuu tre » cua tre, cau tren, cau treo
dan vi » doan vi, don vi, dan va
x hoi » xa hoi, o hoi, x ho

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