"strengthening control" is correct and usable in written English.
You can use it to refer to the process of increasing the regulation or authority over something. For example: The government is taking steps to strengthen control over the energy market.
The SA Country Fire Service (CFS) said the fire's spread slowed significantly overnight on Saturday and crews were able to focus on strengthening control lines.
"The government is trying to prevent these incidents by strengthening control, but too much repression and control is what provokes these acts".
"Strengthening control on vehicle emissions will be a major agenda item for the country's energy savings, emissions reductions, and low-carbon development during the next two years," the plan said.
Our estimates, although constrained by major uncertainties, should be a quantitative input to local authorities become aware of the magnitude of the problem, help realise the substantial potential health benefits from compliance with WHO AQG target values and prioritise actions on strengthening control of outdoor air pollution.
A proposed amendment on the subject may be attached today to legislation that is actually intended to increase protections for investors by strengthening controls over the nation's accounting system and over stock analysts' practices.
In both cases, there was much teeth gnashing in the industry about strengthening controls and trading risk management.
The directive, stamped "for internal use only," calls for "strengthening controls on articles being prepared and the exchange of information with foreign countries".
It urges the agency to "further strengthen control" over the ICW programme.
I always regretted that I was abroad when she was defeated in cabinet on her proposals to strengthen control of the trade unions, though her white paper, In Place Of Strife, caused years of civil war inside the Labour party.
The job of director of the Defense Intelligence Agency has been vacant, filled by an acting director, and Mr. Rumsfeld's delay in filling the post is another sign of his strategy to strengthen control over intelligence.
The number of Weibo users fell after China's censors strengthened control of online discussions last year.
