Find more backlinks. Also try to check your CPC of your keywords. Try https://adwords.google.com/select/KeywordToolExternal
not just keywords you should also work on your content you are putting only images no text how can you get targeted ads brother put some text in every post
I suggest that you work on your content to get better ads. The ads you have are paying low and it is probably related to your content or lack of content. I have not seen your website, so I cannot tell exactly. This is the kind of market that mainly determines what kind of ads you will get.