"for certain reasons" is a perfectly acceptable and usable phrase in written English. It is most commonly used to mean that there are specific reasons or pieces of information that support or explain a certain decision or action. For example, "I decided to take the day off work for certain reasons.".
He could leave only for certain reasons and had to notify prosecutors when he did.
"All I know is government was put here for certain reasons," Ms. Reimer said.
"This is a commercial movie that for certain reasons was released as a specialty movie," he said.
Whereas I find it necessary to fight for certain reasons, the Afghans, historically, if they don't have an invader to fight, they'll fight themselves.
There are certain basic reasons for this and those reasons arrive on a daily basis, especially in a giant organization/university.
Further, it is not easy to get one's emotions in harmony with one's rational recognition of certain reasons for action.
The RFL is a 48-item self-report scale that measures participants' endorsement of certain reasons for living.
Ludwig does not simply clarify my doubts with English writing, it enlightens my writing with new possibilities
Simone Ivan Conte
Software Engineer at Adobe, UK