The £26m summer signing from Valencia has netted just four Premier League goals so far this season, with three of them coming from the penalty spot, and has subsequently lost his spot in the Spain squad.
Asked if he had scored as many goals as he would like, Soldado said: "No. Definitely not. Much less. A lot of my goals have come from the penalty spot.
"I want to score more goals than I am doing at the moment. That is why they signed me. I have been doing it all my career. I haven't done so far here, but I am convinced I will get there. We are trying to score, we create chances but we are not taking them. We need to keep going, working hard and the goals will come.
"I am doing all I can [to get back in the Spain team] but goals are what the coach is looking for in a forward."
Spurs make the short trip across London to face Fulham on Wednesday.