Villa have already made three captures ahead of the new campaign with the signings of right-back Matthew Lowton from Sheffield United, Feyenoord midfielder Karim El Ahmadi and forward Brett Holman from AZ Alkmaar.
But new boss Lambert, who recently succeeded Alex McLeish at the helm following a disappointing Premier League season, has hinted there could be more additions to come.
He told Sky Sports News HD: "I'll try to get lads in to give the group a hand. I think that's important.
"I think everyone knows that - that we'll try and bring in lads.
"The lads that have come in have fitted in very well, at this minute in time. To be fair, the ones that were already here have been great, let alone anything else.
"We just have to get them to work together and if they do that, they'll be fine."