The phrase "cooperation so far" is correct and usable in written English.
This phrase is typically used to describe the level of cooperation between two or more parties on a particular project or objective. For example: "We have been very pleased with the level of cooperation so far on this project. All the teams have worked together well to ensure success."
The inspections chiefs cast serious doubt on Iraq's cooperation so far.
Of course, there has been so little Republican cooperation so far it may not be much of a sacrifice for Mr. Obama.
The summit would demonstrate the "very close cooperation" between the EU and Turkey on the refugee crisis, said Merkel, although there has been minimal cooperation so far.
The American commander of the local provincial reconstruction team, Lt. Col. James H. Hand, said the Afghan troops had received good cooperation so far from the governor and his officials.
Of the subpoena power, Dr. Bement said, "I would use it if I had it," but added that agencies like the Port Authority of New York and New Jersey, which built the World Trade Center, had promised cooperation so far.
But by Friday the dispute appeared to be cooling, with F.B.I. officials saying that the Yemenis, under criticism for their seemingly reluctant cooperation so far, had handed over a large file of transcripts from interviews in the case, and that those, and other new evidence, included valuable details that should help move the investigation forward.
Senator Carl M. Levin of Michigan, the ranking Democrat on the Senate Armed Services Committee, praised the cooperation shown so far.
Military strategy is based on cooperation, and so far we have seen none of that even though we have asked".
The elements of military cooperation announced so far are an incremental start that has stayed clear of emotionally charged issues.
The cooperation included so far the next-generation Smart fortwo and Renault Twingo models, including electric versions, as well as expanding the Smart and Twingo families.
There may also be a simple calculation that the unconditional cooperation offered so far has not paid off as the Justice Department ratchets up the scope of its investigation, as indicated by the latest round of subpoenas.
