Dear GMAT experts,
My career situation:
I have more than 7 years of working experience as Software Engineer/Designer/Architect/Project Lead. I am currently working in Dusseldorf, Germany.
My GMAT saga:
I was born in India and my education from childhood was English. However grammatically(GMATically) I am not so great at English. English was always my second language.
I prepared for GMAT in 2013 for a span of 2 months and gave up preparation since I got a new career opportunity in Germany. I moved to Germany and learned German, and over a period of time working and living in Germany has given me a great edge on German but my English became worst.
GMAT-Prep test:
In my last GMAT prep test, I secured a score of 470 (V-11, Q-43). I am devastated by this
I am aspiring a score of 730-750 to enter my dream B-school

I know how to improve my score from Q43-Q50, but I am clueless about improving my verbal score from V11-V40.
I knew it is difficult but not impossible.
I seek guidance and tips for Verbal preparation from GMAT experts here. Could you please guide me?

Thanks.