Perhaps you should try some spelling variations:
doanh ban » doanh bat, doanh nhan, doanh luan
doanh van » doan van, doanh va, doanh nhan
tu sach » thu sach, su sach, te sach
tuc xay » thuc xay, tuc xa, tu xay
cua tre » cua te, cuu tre, cua triet
tuc vay » tuc va, tu vay, thuc vat
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
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 ((tuc vay) or (tuc xay)) ((doanh van) OR (doanh ban)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu ve cham ((tuc vay) OR (tuc xay)) ((doanh van) OR (doanh ban)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. hieu ve cham ((tuc vay) or (tuc xay)) ((doanh van) OR (doanh ban)) cua tre*".