Perhaps you should try some spelling variations:
doanh ban » doanh van, doanh nhan, doanh luan
doanh bat » danh bat, doanh tai, doanh va
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa

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 hoi. hieu va cam tuc va ((doanh ban) OR (doanh bat)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky lang xa hoi. hieu va cam tuc va ((doanh ban) OR (doanh bat)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang xa hoi. hieu va cam tuc va ((doanh ban) OR (doanh bat)) cua tre*.