Concurrent Form request with different parameter values

[Manikandan Arunachalam]

I am scraping a site which allows only one login session for an account. I am using an account to scrap the site,My requirement is to scrap list of search items where there is a form to search a string, but i would like to scrap list of string search results. I wanna request concurrently to a form in scrapy.How can i achieve this?