"deepened exchanges" is a correct and usable phrase in written English.
You can use it to describe an increase in the intensity or level of communication or interaction between people or groups. Example: The recent conference has led to deepened exchanges between the two countries, paving the way for stronger diplomatic relations and increased cooperation in various fields.
The nuclear deal, he added, has also deepened exchanges among businessmen, tourists, and students, and was already "bearing fruit".
Better mutual understanding of each country's systems, values, and objectives is essential, which will necessitate deepened exchanges in all sectors of society.
China firmly supports the work of the IAEA and the U.N., and continuously benefits from the deepening exchange and cooperation with other countries on nuclear security.
"I fear that as both an Asian and Japanese writer," Murakami writes, "the steady achievements we've made (in deepening cultural exchanges and understanding with our Asia neighbors) will be hugely damaged" because of the recent problems.
Already the quality of the conversation about attention has deepened, both in private email exchanges and in feedback from our admittedly premature and sketchy efforts.
On Thursday, those concerns deepened when AktieTorget, a Swedish exchange for small-capitalization stocks like Global Gaming Factory, said it might delist the company's shares because of possibly misleading statements it had made.
Finer differentiation between different kinds of information and a discussion about the quality of information exchanged would have deepened the insights from the workshops.
That left the Treasury secretary, Timothy F. Geithner, to make an unscheduled stop in China on his way home from South Korea to discuss the deepening tensions over exchange rates with a top Chinese finance official.
She called on Beijing to make "responsible policy adjustments" on its artificially depressed exchange rate — an issue that has deepened tensions between the United States and China in recent weeks because the undervalued Chinese currency has hurt American exports.
The tacit alliance, championed by Israel's deputy defense minister, Shimon Peres, deepened during the late '50s and early '60s through military cooperation and cultural exchanges.
The Fed has accepted all manner of dubious assets in exchange for its various loans as the crisis has deepened.
