Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
viec bach » vien bach, viec ban, viec bao
thanh va » thanh van, hanh va, thanh ha
tu sach » thu sach, su sach, te sach
cau tre » cau tren, cau treo, cuu tre
cau tra » ca tra, cau ra, cau truc
sach ky » sac ky, sach y, sach ty
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
xuc va » tuc va, luc va, xac va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky dang xa hoi. nhieu viec bach ((xuc va) or (duc va)) thanh va ((cau tre) OR (cau tra))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xa hoi. nhieu viec bach ((xuc va) OR (duc va)) thanh va ((cau tre) OR (cau tra)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang xa hoi. nhieu viec bach ((xuc va) or (duc va)) thanh va ((cau tre) OR (cau tra))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xa hoi. nhieu viec bach ((xuc va) or (duc va)) thanh va ((cau tre) OR (cau tra))*.