guys my visa was refused thrice times on univ of illinios springfield ,univ pf central missouri nw

guys my visa was refused thrice times on univ of illinios springfield ,univ pf central missouri
nw iam giving visa one more time (midwestern state university)
what changes i have to do in my ds-160 form
my profile:
2015 passout no work experience
gre 285
pte :54
btech :73%
can any one please help me