Here is my config about Easygrep:
let g:EasyGrepRecursive=1
let g:EasyGrepHidden=1
let g:EasyGrepIgnoreCase=1
let g:EasyGrepMode=2
let g:EasyGrepFileAssociations=$HOME."/.vim/bundle/vim-easygrep/plugin/EasyGrepFileAssociations"
After typing \vv, the keyword under cursor is greped and the output is displayed in the quickfix window. Then I type :ccl<CR> to close the quickfix window.
However, if I type \vv to do another search, the quickfix window can't be shown anymore. I have to manually type :cope<CR> to get it back.