Search Campaigns depend on bidding strategy, the result varies depending on ad ranking and a lot of other factors as well, such as competitors bidding high on certain keywords via Manuel bidding. However, if we run search first on maximize clicks strategy, we can get an idea about bidding, ad ranking, thus with that data we can improve the campaign.
You might want to look at google ads help section for information on bidding, etc. The key is to improve the campaign as much as you can to achieve greater conversions.