"regain control over" is grammatically correct and is commonly used in written English.
Example: After the chaos of the storm, the city worked tirelessly to regain control over its infrastructure and restore normalcy.
Western elites turned to oil partly because they wanted to regain control over energy supplies.
Of course we should demand that governments help women regain control over their bodies.
We must act now and we must act together to regain control over our shared destiny".
Mr. Ryan also urged agencies to seek to "regain control over the whole new-business process".
"Paxil provides a new alternative to help sufferers regain control over their lives".
Last month, Assad vowed to regain control over "the whole country".
The next step is to regain control over your work behavior.
Alibaba had long sought to repurchase the shares to help regain control over its corporate destiny.
Some local authorities are vying to regain control over those academies that are not faring well.
It would regain control over fishing rights around its coast.Some irksome regulations could be ditched, too.
Relaxation exercises may help a woman regain control over vaginal muscles.
