The phrase "a more complex relationship" is correct and usable in written English.
It can be used when discussing the nature of a relationship that involves multiple layers or factors, indicating that it is not straightforward.
Example: "Their friendship has evolved into a more complex relationship, filled with both support and rivalry."
Alternatives: "a more intricate relationship" or "a more nuanced relationship".
In fact, the cases seem to have a more complex relationship than it first appears.
But centrist Democrats have a more complex relationship with Ms. Omar.
But where Melville had his noble young sailor Budd executed for accidentally killing a bullying superior officer, Denis contrives a more complex relationship.
Electrode films (cast using MnO2, graphite and PVDF) have been investigated using N2 sorption at 77 K and show a more complex relationship than their parent oxides.
Born in 1931 near Stavropol in the North Caucasus, Gorbachev was close to his father, who fought in World War II, but had a more complex relationship with his mother, who was severe and whipped him with a belt.
While Mrs. Astor has enjoyed the affection of a grateful townsfolk, her daughter-in-law, Charlene Marshall, 61, has had a more complex relationship with Northeast Harbor, where she once lived.
Data from patients2,4, as well as from rodent models of depression5,6 indicate that the LHb is generally overactive in depression, although other studies in both humans7 and animals8 have suggested a more complex relationship.
The more accurate question is not: "What is it like to be a badger or a goat?" It is: "What is it like to be this particular badger, or that particular goat?" When we recognize each being's individuality, we have formed a more complex relationship and travelled farther from our preconceptions.
Interestingly, cytokine production in response to LPS in vitro reveals a more complex relationship.
This suggests a more complex relationship between TET2, DNA methylation status, and malignant transformation.
Panentheism offers a more complex relationship between God and the world than is necessary.
