Tips for literature search So I'm doing my senior thesis (undergrad) on the politics of emerging technologies and how that applies to artificial intelligence policy. I've been trying to look at past examples of technologies as they were emerging and how research communities, industry, civil groups, and governments react. A good example being developments in recombinant DNA leading to the Asilomar Conference, or fetal tissue stem cell therapy leading to George Bush's executive order on federal funding on the subject. However, I'm running into a few problems:

1) Research is slow because the main search engines I'm using (G-Scholar, JSTOR) bring up a bunch of irrelevant papers. Even if I use quotes, something like ( 
 "emerging technology" politics ) will bring a lot of stuff I don't need. Is there something I can do to help narrow it down to papers that are more relevant for my topic, such as additional terms, or another search engine?

2) I feel like I don't know how to do this kind of research efficiently. I've never done something this complex, and I'm pressed on time, so I can't make any mistakes. At this point, I'm just putting in search terms and finding papers that seem to fit within the general area of my paper and taking notes on Evernote. But, I feel like this could be structured/targeted so much better. What's the best meta-research strategy?

Thanks for your time, and if you have any other relevant suggestions, I'd love to hear.
Regarding literature search I can give you the following suggestion: It sounds you already found some papers that are somehow related to your topic. Maybe your advisor already has some related work in this area? That would also work. 

With this publication at hand there are two options to find new interesting work in this area: The reference section of this publication and the publication venue. Look up where the publication was published and read more papers from the same venue.


  At this point, I'm just putting in search terms and finding papers that seem to fit within the general area of my paper and taking notes on Evernote. But, I feel like this could be structured/targeted so much better. 


However, for me it does not sound that literature search is your main problem. It is structuring your work. It sounds odd, but whenever I come to this point, I start to write the paper or thesis or whatever your goal is.

So just start writing up any thoughts you already have, include the notes you already have with the citations to the papers you already found. This does not have to be a coherent text, just a bunch of unfinished text segments. Eventually you come to the point where you have no notes and no own thoughts left. Then you will see what is already covered by related work and where you still have to find other publications. But now you know what to search for and you can use more precise search terms! Be prepared to rewrite every sentence several times afterwards, but you get the feeling that your work is proceeding and that is a huge motivation boost.