'remedy weakness' is a grammatically correct and usable phrase in written English.
You can use it when referring to an action taken to alleviate a weakness or deficiency in something. For example, "The company sought to remedy its weaknesses in customer service by implementing a new feedback system."
"In its first year…Romania has continued to make efforts to remedy weaknesses that would otherwise prevent an effective application of EU laws, policies and programmes.
In fact, it was quite clear that particle theorists, unlike their wave-theory opponents, were striving to remedy weaknesses rather than scoring successes (see Worrall 1990).
As life-long learners, physicians need these skills to solve problems they encounter when diagnosing and treating patients and to remedy weaknesses in their knowledge and skills as part of continuing medical education (Duffy 2008; Slotnick 1996).
While some countries recognized the need to establish monitoring and evaluation indicators to identify and remedy weaknesses encountered during plan implementation, such as the percentage of cadres being absorbed into the civil service, they instead focused on broad health system outputs, like the percentage of newly trained workers.
Machiavelli himself despised the moderns of his day as weak, but he also held forth the possibility of a "perpetual republic" that would remedy the weakness of the moderns and correct the errors of the Romans and so establish a political order no longer subject to the vicissitudes of fortune.
To remedy this weakness, a B-tree-based buffer manager is further proposed.
To remedy this weakness, the MaC system has been extended with a feedback capability.
The last two measures were introduced to remedy the weakness of the nonexperiments in defining causal relationships.
We remedy this weakness by proposing four additional postulates, which are sound relative to a qualitative version of probabilistic conditioning.
To remedy this weakness, we propose to transform the replacement plans into B-tree organization and thus it benefits from sophisticated B-tree concurrency control techniques.
