Perhaps you should try some spelling variations:
doanh dan » doanh ban, doanh van, doanh doanh
dieu hien » dieu khien, dieu kien, bieu hien
doanh dao » doanh bao, doanh cao, doanh giao
thu sach » tu sach, thuat sach, thuoc sach
hien cam » hien cac, hien cau, hien giam
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, tuc va, luc va
cua cu » cua chu, cua cau, cua su

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky tang ma hoi. dieu hien cam xuc va ((doanh dan) OR (doanh dao)) cua cu~".
• Adding a wildcard symbol may retrieve word variants: thu sach ky tang ma hoi. dieu hien cam xuc va ((doanh dan) OR (doanh dao)) cua cu*.