'tighter cooperation' is correct and usable in written English.
You could use it when you want to express the need for collaborative efforts that are closer and more integrated than before. For example: To solve this issue, we need tighter cooperation between all stakeholders.
If the euro zone cannot summon enough cooperation now, how is any union requiring tighter cooperation supposed to work?
Checking proliferation will require more innovative and tighter cooperation between the agency ElBaradei loves and the United States, of which he no longer seems especially fond.
Their growing collaboration is expected to lead to tighter cooperation in one of the world's most increasingly important regions, the Indian Ocean.
Whatever the difficulties ahead for establishing a BRICS bank, China is officially on board with the concept of tighter cooperation with its peer economies.
In a statement on Friday, Beji Caid Essebsi called for tighter cooperation to fight "the plague of terrorism that threatens the security and stability of all countries".
Mohammed is advancing an agenda that is bringing Riyadh into tighter cooperation not only with a hawkish Trump administration, but with Israel itself.
The tight cooperation between governments and automakers on the Continent has produced happier results.
In addition, the population partition operator is triggered at every generation, which results in timely information sharing and tight cooperation among the component DE variants.
The development of the instrument results from a tight cooperation between European research institutes and private firms each partner having a specific know how.
It consists of active processes that generate knowledge by means of a tight cooperation of perception, reasoning, learning and prior models.
Although American military support for the Saudi-led coalisionots not as extensive in the sea as in the air, there is tight cooperation in many areas.
