The biaxial currents method is presented to enhance the magnetoresistance (MR) ratio and linearity for the field in bilayer NiO(30 nm)/NiFe(30 nm) due to combined effects of MR and Planar Hall Resistance (PHR). When the biaxial currents I=(I-x, I-y) are simultaneously introduced in the sample, the measured voltage is given as functions of the tensor components of resistance and currents I-x, I-y, and the apparent MR ratio, deltaV / V-o is enhanced over a few hundred percent.