Perhaps you should try some spelling variations:
doanh dan » doanh ban, doanh van, doanh dao
van doanh » toan doanh, van dong, van thanh
khien cau » hien cau, thien cau, khien canh
thu sach » thuat sach, thuoc sach, thu hoach
dan cau » danh cau, dan ca, dat cau
tu sach » su sach, te sach, vu sach
tu cach » tu cac
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
cau xuc » cam xuc, cau luc, cau truc
xuc van » duc van, luc van, vuc van
ma hoi » mai hoi, xa hoi, ma hoa
cau tu » dau tu, cau truc

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (((tu sach) OR (tu cach)))) ky tang ma hoi. dieu khien cau xuc van doanh dan cau tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (((tu sach) OR (tu cach)))) ky tang ma hoi. dieu khien cau xuc van doanh dan cau tu~".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (((tu sach) OR (tu cach)))) ky tang ma hoi. dieu khien cau xuc van doanh dan cau tu*.