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 y, sach ty
tu sach » thu sach, su sach, te sach
lang ha » long ha
lang xa » dang xay, lang van
cua tre » cua te, cuu tre, cua triet
cac lo » cac lop, cac bo, cac ho
cac co » cac cong

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 ((lang xa) OR (lang ha)) 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 ((lang xa) OR (lang ha)) 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 ((lang xa) OR (lang ha)) hoi. nhieu viec ((cac lo) or (cac co)) van doanh vai cua tre*".