Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
doanh vai » doanh tai, doanh va, doanh van
van doanh » toan doanh, van dong, van thanh
vai cua » dai cua, hai cua, lai cua
sach ky » sac ky, sach ty, sach kem
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, dang xay, lang van
cac co » cac cong
cac lo » cac lop, cac bo, cac ho

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) OR (sach y)) lang xa hoi. nhieu viec ((cac lo) or (cac co)) van doanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) lang xa hoi. nhieu viec ((cac lo) OR (cac co)) van doanh vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach y)) lang xa hoi. nhieu viec ((cac lo) or (cac co)) van doanh vai cua tre*".