"will definitely find" is correct and usable in written English.
You can use it to express certainty in the outcome of a search. Example: I assure you that if you keep looking, you will definitely find what you're looking for.
Assuming you have learned from your mistakes and are willing to apply the lessons learned to your new career, you will definitely find success.
They will definitely find the answer".
We will definitely find out in 2016, but when?
But in other countries they will definitely find an audience".
If you type in "Stew" and "the Negro Problem," which is my band's name, you will definitely find me.
If you're curious you will definitely find enough information – you don't need more, and whenever we're given more, we don't accept it.
If I'm hungry, you'll definitely find me in the cookbook section.
Neil Patel shares 17 things he wishes he had known when starting his own business, including, "Sell something people can afford": "Find out what people can pay for a product before you design it, and while you won't get rich quick this way, you'll definitely find it easier to sell your product".
You can download it in a couple of formats here — it's long, but scan through it and you'll definitely find something worth commenting on.
Above photo taken from Hollywood Reporter in an article entitled 'Facebook's Mark Zuckerberg Named Worst Dressed in Silicon Valley.' Just attend any of the countless events on the geek events list and you'll definitely find worst nearly any night of the week.
There's a twist about ten minutes into the film that I won't spoil, but setting that aside, if you've ever watched VHS tapes of old children's television and had dreams of making your own show, you'll definitely find something to relate to here.
