When I am trying to search for certain keywords I am not getting everything (or I dont think I am).

Lets just say for example I search for 'Dog'. I get 2 videos and 3 pictures, so I browse the host of one of the videos. I am looking through the videos that come up when I browse the host and I see that they have 5 things with 'Dog' in it. Why do these things not come up when I tried to search for that keyword? It's REALLY annoying when you are trying to find certain things, how can I get better search results?

Note: I have all settings to allow any quality or speed. I am using the newest beta version.