Andre Villas-Boas' men have only scored nine goals in the Premier League this season so far, and have not scored in their last two games, which saw them pick up just one point and drop to seventh.
A change in luck in front of goal would be handy in their next two league games, which come at Manchester City on Sunday and at home to Manchester United seven days later.
In an interview with Sky Sports News' Weekend Warm-up, he said: "I think all in all we've done okay (so far). Crucial games where we had the chance to go up to second place or secure a space up near the top, we struggled against West Ham and Newcastle at home which was a pity,
"I mean still in the Premier League we've done good so far. We've got a big game coming up now and the Europa League and the cup we're still in, I think it's still okay.
"If you see the whole team we want to improve as much as we can, we need to score more goals.
"We have, I think, scored only nine goals so far in the Premier League, with the quality we have in the side and the players we have I think that's not enough. We're still improving and trying to find ourselves more.
"I think when we get to release that button we'll probably score in a game four or more goals and our confidence will rise more, especially for the strikers.
"Still last year, when you see the games, we had a lot of fortune with Gareth Bale's wonder strikes. We're still working hard as a team, we have a lot of possession but we need to find the back of the net more.
"At Newcastle, Tim Krul had a hell of a day, I think his best day ever, sometimes it's just a little bit of lack of luck. We're trying hard to succeed on the weekends and it's finding the back of the net. I have a good feeling for Man City.
"I think it's a matter of luck and you know a matter of time until we probably get the best out of us. There's a lot of new players and we've been rotating a lot because of the Europa League and the long season we have. The time is coming and I'm sure the quality will shine soon. I have high prospects and belief that we're a strong squad."
Holtby also had words of support for big-money summer signing Roberto Soldado, who has struggled for goals from open play since joining from Valencia.
He added: "It's probably a difference between the Spanish and English league, I witness it because we have more teams here.
"You sit back and play with maybe five at the back and try to defend as good as possible. I think it's different in Spain or in Germany where you have more attacking football or maybe more open games. It's a difference for him and he's adapting well, he will score many, many goals for us."