Hi omerdoron.
To score V37+, you need to get around 75%+ of the counted verbal questions you see correct, and the counted questions will likely all be medium or hard questions. Probably, you won't see any easy counted questions if you're scoring V37+
So, when you're practicing, you need to be very good in sub-600 level questions and 600-level questions and pretty good in 700 level questions.
To be well positioned to achieve your score goal, you could achieve the following accuracies when answering questions untimed:
- In verbal questions rated up to 35%, close to 100%
- In verbal questions rated 45% to 65%, 90%+
- In verbal questions rated 75% to 95%, 70%+
Your accuracies could be slightly lower timed, but you should achieve the above high accuracies untimed before seeking to answer verbal questions timed.
For some additional insights, including some ideas on how best to practice, see these posts.
Three Key Practice Tips for Mastering GMAT VerbalThe Best GMAT Practice Methods