Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
toc sach » hoc sach, doc sach, thuoc sach
viec dan » viec dang, viec ban, viec dat
dan thuc » dan toc, am thuc
thuc cao » thuoc cao, thuc co, thuc can
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cao dan » cao dang, cao danh, cac dan
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
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 nang x hoi. nhieu viec dan thuc cao dan vi ((cuu tre) OR (cua tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty nang x hoi. nhieu viec dan thuc cao dan vi ((cuu tre) OR (cua tre))".
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang x hoi. nhieu viec dan thuc cao dan vi ((cuu tre) OR (cua tre))*.