"returned through" is a correct and usable phrase in written English.
It generally means to bring something back, often through a particular route or means. For example, "The ship returned through the Panama Canal."
The money was eventually returned through a taxpayer-financed bailout plan overseen by Mr. Sundlun.
Please note that books cannot be returned through the Campus Mail delivery system.
A few Soviet prisoners have been returned through intermediaries to the Soviet Embassy in Islamabad.
They are returned through use of force at night through the river.
Holding hands this time, they returned through the baby's room to the front door.
He stood alone, smelling everything, then returned through the noise and the crowd to the side that faced land.
Fallout was swept away by prevailing winds and returned through precipitation, some of it falling on farms and dairies.
They said he could have returned through a third country like Turkey or Thailand to avoid detection.
Books can be returned through the first two weeks of a new quarter if the following criteria are met.
Many stores, for instance, will allow items purchased in November and December to be returned through January.
After taking him to his room, she returned through an employee entrance "to avoid a hassle with the bodyguards".
