Perhaps you should try some spelling variations:
doanh dan » doanh ban, doanh van, doanh dao
van doanh » toan doanh, van dong, van thanh
khien cam » khien cau, khien canh, khien giam
thu sach » thuat sach, thuoc sach, thu hoach
dan cau » danh cau, dan ca, dat cau
xuc van » duc van, luc van, vuc van
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
su sach » so sach, vu sach
tu sach » te sach, tu cach, vu sach
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 (su sach)))) ky tang ma hoi. dieu khien cam 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 (su sach)))) ky tang ma hoi. dieu khien cam xuc van doanh dan cau tu~".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (((tu sach) OR (su sach)))) ky tang ma hoi. dieu khien cam xuc van doanh dan cau tu*.