Order of results?

[yh54321]

I performed a search with the name of a novel as my query, and the first result was a pornographic image. When I manually enter this search query on Google images, I do not see this pornographic image anywhere in the search results. This is not a 'safe search' related issue.

How are the results being selected?
What determines the order of the results?

Ideally, I would like for the results to be the same as those which are visible when manually searching Google Images...

[Mairon31]

You can add safe search option to block pornographic content (NSFW) and leaving content safe.

A quick example:
client.search("Steve Angello", {safe: "active"});