google-query.js

var request = require("request");
var async = require("async");
var fs = require("fs");

function searchFor(searchQuery, pageNum, callback) {
  for(var i = 0; i < pageNum; i++) {
    (function(i) {
      request.get("https://www.google.fr/search?q=" + searchQuery + "&start=" + i * 10, function(err, res) {
        if(err) throw err;

        fs.writeFile(searchQuery + "-page" + i + ".html", res.body, done);
      });
    })(i);
  }

  var count = 0;
  function done() {
    count++;
    if(count === pageNum) {
      callback();
    }
  }
}

var pageNum = 3;
var arr = fs.readFileSync("filename.txt", 'utf8').split("\n").map(function(v) {return v.split(" ").join("+");});

async.mapLimit(arr, 5, function(v, cb) {
  searchFor(v, pageNum, cb);
}, function(err) {
  if(err) throw err;
  console.log("Done");
});