Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
doanh van » doan van, doanh va, doanh ban
cham hoc » cham soc, chat hoc, cham hoi
cau treo » cau theo, cau tren, cau triet
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
hoc van » hoc dan, hoc va, hoc vat
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren
tu sach » thu sach, su sach, te sach
y nang » ky nang, ly nang, v nang

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 nang xa hoi. hieu ve cham hoc van doanh van ((cua tre) or (((cuu tre) OR (cau treo))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu ve cham hoc van doanh van ((cua tre) OR (((cuu tre) OR (cau treo))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. hieu ve cham hoc van doanh van ((cua tre) or (((cuu tre) OR (cau treo))))*".