"regain courage" is a perfectly acceptable phrase in written English.
You can use it when describing someone who is attempting to rebuild their courage or confidence, for example: "After experiencing a traumatic event, he had to work hard to regain courage."
As the common refrain from the Bank of England onwards is that low real wages are keeping living standards down, and as even the Bank's governor believes the fiscal squeeze has inhibited the pace of recovery, it is surely time for the Labour party to regain the courage of the convictions of Hattersley and others when it comes to economic and social policy.
But the NRA's allies will soon regain their courage — which is why New York Mayor Michael Bloomberg (I) was correct to say that "immediate national action" is what will work, including eliminating loopholes in background checks for those who buy guns, reinstating the assault-weapons ban and banning high-capacity magazines.
More importantly, is when will BBC news regain its courage and independence, lost at the time of David Kelly's death.
In the scene below, Elder Price (Andrew Rannells) has lost his faith and attempts to regain the courage to fight an evil warlord aiming to control the Ugandan people.
Her sister, Sharell Vines, of Irvington, carries her around till she regains her courage.
Distraught, Josie cowers away but soon regains enough courage to confront Meredith at her lavish Los Angeles estate.
But as I overcame my isolation in this new country, I regained the courage to strike out on my own.
When I regained enough courage to look out the window again, I scanned the vast green expanse before me and spotted a village perched atop one of the highest peaks in the area.
Consequently, when those in the city obtained such large supplies, the besieged, who were already disheartened, regained their courage.
While Gold admits to a lengthy period of time in which he wished he would die, he regained his courage (in no small part inspired by his family and by his friend Anne, who had dedicated a major part of her entire life to building and staffing a residential school for orphans in Rwanda, following the genocide there).
