"Full cooperation" means working together completely, sharing information or resources, and assisting each other in achieving a common goal. Full definition
Proper cleaning of the teeth requires full cooperation of the patient so that plaque and tartar can be completely removed. (polosprings.com)
MPs questioning the police chief in charge of the cash for honours inquiry have found the investigation did not receive full cooperation from all those involved in the case. (politics.co.uk)
Collaborative Divorce requires full disclosure and full cooperation on the part of the couple seeking dissolution. (ctcollaborativedivorce.com)