Some official subject headings related to your research.
Do Androids Dream of Electric Sheep
Androids or Robots
Sentience or Consciousness
Cold War or Nuclear War
Boolean Operators: Search with AND, OR, NOT
Searching term tricks
* Expand the word you are searching to include plurals. etc.: Apocalyp* gives you Apocalyptic, Apocalypse
"quotes" Use for phrases: "Phillip Dick"
OR Use for either or searching: Androids or Robot
And Use to combine terms you want to have: Apocalyp* and scifi
Not Use when you want to eliminate a word from your search (Warning: if you cut a word and it is in an article with words you want, you won't see that article!)
Not Alien or invasion