Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
van doanh » toan doanh, van dong, van thanh
viec cac » vien cac, viec cua, viec lam
thu sach » thuat sach, thuoc sach, thu hoach
doanh va » doan va, doanh tai, doanh cua
cua tre » cua te, cua triet, dua tren
tu sach » su sach, te sach, tu cach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cuu tre » cau tren, cau treo
cac so » cac co, cac bo, cac ho
so van » su van, vo van

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky lang xa hoi. hieu viec cac so van doanh va ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ky lang xa hoi. hieu viec cac so van doanh va ((cua tre) or (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ky lang xa hoi. hieu viec cac so van doanh va ((cua tre) or (cuu tre))*.