Just found a website that provide useful tool for keyword research … it’s Ubersuggest.org. This tool is very useful to find long tail keyword … i.e you want to know what is long tail keyword of “bedroom” that most google’s users type on the Google search box ? Well you just type bedroom and choose your language and then click “Suggest” button and TADAA … you wil get the long tail keyword of “bedroom” based on Google Suggest .
Another cool thing about this tool is you can click on each word result to get more deeper keyword suggestion. Really useful tool and saving time 
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PREVIEW :
You can save the result on txt format. Nice
You might also try KeywordDonkey. It do the same as Ubersuggest, but you can run a whole list though without the copy/paste…