Say I want to search for images with the keywords
wallpaper nirvana. I get lots of images related to the popular band Nirvana. But how can I exclude them and get images, related to the mental state Nirvana. I tried with
nirvana mental state or
nirvana psychology, but I still get a lot of band-related results.
Another example is the search term
against the current, which also returns lots of results related to the music band Against the current. I tried
against the current -band -group but that didn't help a lot either. In general the technique I use is to add more specific keywords, but some phrases seem so deep related with certain well known entities (like music bands, movies, shows etc.), that sometimes it is really hard to find relevant info.