The phrase "owing to the complexity" is grammatically correct and can be used in written English.
It is commonly used to introduce a reason or explanation for something. Example: Owing to the complexity of the situation, the team was unable to come up with a satisfactory solution. In this sentence, "owing to the complexity" introduces the reason why the team was unable to find a solution.
Downing Street continued to send out frantic signals that it was listening to the criticism, but, unable to agree how to back down, partly owing to the complexity of the legal issues, it continued to send out mixed signals.
It is difficult to adjusting them simultaneously owing to the complexity of hydraulic thermal dynamics.
Any system that limited the engines could not be implemented immediately owing to the complexity of the cars.
However, owing to the complexity of their structural behaviour, little is known about the root causes of adhesive joint failure.
Managing its resources especially energy is a very crucial factor owing to the complexity of various interlinked parameters.
However, on one hand, there is no liner correlation between students' academic motivation and their learning performance, owing to the complexity of learning process (Fortier, Vallerand, & Guay, 1995).
However, owing to the complexity of the phenomenon of flooding and to numerous factors affecting it, a sufficiently definite theory has not yet emerged.
In practice, owing to the complexity of real life data, it is cumbersome to find a good statistical distribution for empirical data by trial and error.
Currently, there is a high degree of empiricism in the design process of such reactors owing to the complexity of coupled flow and reaction mechanism.
Despite being pervasive in the pharmaceutical field, it is one of the least understood processes owing to the complexity of material and process variables involved during milling.
Nevertheless, packing algorithms using 3D models are not widely used in practice, due to the large decrease in efficiency, owing to the complexity and excessive computational time.
