Urgent- How to increase accuracy of a text classification model

Hi. It’s kind of urgent. I have prepared my model and I’m getting only 56% accuracy. How can I increase the accuracy? My model is attached below. Would really appreaciate if anyone helps me out here.
https://mega.nz/#!66RkFIZL!coLTrAgePpCMT-L-ufB_Hf0PSNFWSeO2tdiPbko6FS0

Duplicate: (Urgent) I am having some problem with Strings to document node