The phrase "a complex array of problems" is correct and usable in written English.
It can be used when describing a situation that involves multiple, intricate issues or challenges that are interconnected.
Example: "The project faced a complex array of problems, including budget constraints, staffing shortages, and technical difficulties."
Alternatives: "a complicated set of issues" or "a multifaceted range of challenges."
That said, the low-risk youths in state custody have a complex array of problems and a great need for counseling and psychiatric services.
These fellow citizens are affected by a complex array of problems from racial profiling and voter suppression to a slanted criminal justice system and only half- hearted affirmative action.
The difficulties associated with HCV screening procedures in a prison setting as Opera is, are principally related to severe limitation due to a complex array of problems.
No one gets a magic wand that allows for a complex array of medical problems to be fixed all at once.
But interviews with executives at record labels, Internet companies and research companies revealed a much more complex array of problems facing the music business than just digital piracy.
The need to prioritise across a complex array of health and other problems facing many Aboriginal patients is a further challenge to achieving regular assessment of modifiable health risks and the provision of preventive health care [ 14, 21].
It is unlikely that any rival will have all of the answers to the complex array of problems facing the party, and those challenges have evolved rapidly even in the months since the party last elected a leader.
But when they do, they describe a complex array of political, social and family problems that propelled them to take desperate decisions.
A complex array of medical, emotional and social problems really can resemble a cascade in which each malady worsens another, and the net effect is a downward spiral into despondent disability.
Death from critical illness is rare; however, survivors and their families can be exposed to a complex array of negative physical, psychological and social problems.
Sophia Casson, an analyst in East Timor with the International Crisis Group, said camp inhabitants faced the problems of not only rebuilding but also of settling a complex array of communal issues.
