Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
danh hoi » danh hoa, dan hoi, danh hoc
van danh » van doanh, van anh, van hanh
lang van » dang van, tang van, hoang van
hoi cua » hoi chuc
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay
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 y ((lang xa) OR (lang van)) hoi. hieu viec ((cac lo) or (cac co)) van danh hoi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((lang xa) OR (lang van)) hoi. hieu viec ((cac lo) OR (cac co)) van danh hoi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((lang xa) OR (lang van)) hoi. hieu viec ((cac lo) or (cac co)) van danh hoi cua tre*".