The phrase "certain thought" is correct and usable in written English.
It can be used to refer to a particular idea or belief that is being discussed or considered. Here is an example sentence: "She couldn't shake off the certain thought that she had forgotten something important before leaving the house."
Yet more research showed how they could lead consumers down a certain thought process to get them to buy.
My dad teaches sociology, so he talks about group behaviour and groupthink and the way people coalesce around certain thought patterns.
Thus, fear might be a combination of a certain thought (the thought that there is an abyss ahead), a certain desire (a desire not to fall), and certain sensations (those peculiar to anxiety).
If the development of certain thought processes was on a genetically determined timetable, simple reinforcement was not sufficient to teach concepts; the child's mental development would have to be at the proper stage to assimilate those concepts.
Given a human being who is thinking a certain thought at a certain moment in the actual world, his "counterpart" in a nonactual world that is a perfect local-quality duplicate of the actual world will be thinking the very same thought at the corresponding moment in the history of the duplicate world.
But when a certain thought style develops and dominates researchers' minds, alternative ways of development become closed.
In the name of totalitarian ideologies, millions were slaughtered because people thought certain thoughts and as a consequence performed certain actions.
In this case, an appearance of thoughtfulness masks, and colludes with, the avoidance of certain thoughts.
Though acknowledging that he is a great expert in respect of neither, merely a keen amateur, he has been struck by certain thought-provoking resemblances between these two inexhaustible sources of information.
Frazier's shallowness left certain thoughts dangling.
— humans have expressing certain thoughts and feelings via any form of communication.
