Perhaps you should try some spelling variations:
doanh khoanh » doanh khoa, doanh doanh, doanh hoan
khoanh khac » khoa khac
khac thong » khac thuong, khac trong, khap thong
hoc phuong » hoc thuong, cac phuong
sach tien » sach tren, sach thieu
hang khoa » dung khoa
sach dao » lanh dao
tu doanh » su doanh, te doanh, ty doanh
tien thu » tieu thu, kien thuc, trien thi
thu hang » thi hang, thuc hanh, thu huong
khoa hoc » hoa hoc
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
dao tu » dao tuc, dao tru, tao tu

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 dao tu doanh khoanh khac thong ) or ( su sach tien thu hang khoa hoc phuong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach dao tu doanh khoanh khac thong ) OR ( su sach tien thu hang khoa hoc phuong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach dao tu doanh khoanh khac thong ) or ( su sach tien thu hang khoa hoc phuong ))*.