How to use search on Google correctly [on hold]

I'm trying to search Big Bang Theory on Google but what it gives is not what I need for my research, it showing a boy band and TV programs instead of The Big Bang theory. Is there anyway to filter does thing out of this search engine?

I search big bang and here's what I've got.

so I think it's generic so I search The big bang theory and it gives me TV program.

I failed again so I tried to again big bang theories and it gives me the same TV program again, so I decide to watch it, it's good but... I need the big bang theory.