Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
van doanh » toan doanh, van dong, van thanh
tai cuu » tai cuc, tai buu, tai cua
cac lop » cac hop, cac loai
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
ky lang » ky nang, ky dang, ky tang
cuu tre » cua tre, cau tren, cau treo
cac lo » cac co, cac bo, cac ho
ha hoi » hoa hoi, ha noi, va hoi

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