The phrase "a request for cooperation" is correct and usable in written English.
You can use it when you are asking someone or a group to work together or assist in a particular task or project.
Example: "We are sending out a request for cooperation to all departments to ensure the success of the upcoming event."
Alternatives: "a plea for collaboration" or "a call for assistance".
A Foreign Ministry spokeswoman in Tokyo said the government had received a request for "cooperation" from China and conveyed it to the police.
The White House has been frustrated by Turkey's refusal to allow American troops mount a ground attack into northern Iraq from Turkey, and Turkey's long delay in acting on a request for cooperation made over three months ago.
The prosecutors said they had found the bonds — along with a fake copy of the Treaty of Versailles, signed by European powers at the end of World War I — in special compartments in metal crates in a Swiss vault, which the Swiss authorities had sent them last fall following a request for cooperation.
In the context of cooperative relay network, one user might individually select its best relay user and form a request for cooperation.
The letters included an outline of the project objectives as well as a request for cooperation and informed consent.
A letter describing the purpose of the research and a request for cooperation was distributed to the parents of the children.
Both the pre-decision and the decision unit are therefore in accordance and a request of cooperation for energy recovery is sent to two other agents (Agent B and Agent C) via the execution module.
Mr. Tudjman, who died in December, resisted almost all requests for cooperation with the United Nations war crimes tribunal in The Hague.
She explains that Mantel had been investigating the situation when he was killed, and Vance hesitantly grants her request for cooperation among the agencies.
A request for a photo was declined.
