BNO055 use for position tracking/dead reckoning

Dear all,
A BNO055 is used with an Arduino Uno and the Adafruit BNO055 library running in 9DOF Mode. Is there a way to increase the accuracy of the fused measurements to get a smaller cummulated error caused by the double integration? Or is there another technique to get better results by using third-party software/components?

Thanks.