"intense struggles" is a correct and usable phrase in written English
It can be used to describe a difficult or challenging experience someone is going through. It can be used in both formal and informal writing. Example: Despite facing intense struggles and setbacks, she remained determined to achieve her goals.
They were at bottom moral judgments, often squeezed out of intense struggles with his own nature and an almost perversely hard life.
BEIJING -- The South China Sea has become a primary issue for China-U.S. relations, evident in the fierce and intense struggles over China's land reclamation in the waters near the Nansha Islands [the Chinese name for the Spratly Islands -- ed.], with some voices in both countries calling for military solutions.
Focusing on various, interlinking families, the book is an epic of England at the turn of the twentieth century, depicting the intense struggles of that time regarding economic disparities, international politics, and women's suffrage, and culminating--as of course it must--with the apocalypse of the first World War.
Many of the most revered figures in the Bible had intense struggles with temptation(often marked with failure).
For four or five days an intense struggle reigned.
The result has been an intense struggle to find and press cases with Supreme Court potential.
An intense struggle for influence took place during the year among Yeltsin's aides and ministers.
His decisions and speeches are written in long-hand, frequently after hours of intense struggle.
The nobles continued to engage in an intense struggle for influence and power in the reign of Henry IV (1454 74).
According to White House officials and memos, ending aid to Yemen would have undercut that country's intense struggle against Al Qaeda.
Allied forces took the islands from the Japanese on Oct. 7, 1943, after an intense struggle that began on June 29.
