The phrase "bolster efforts" is correct and completely usable in written English.
It can be used when referring to strengthening efforts in a particular field, often involving collaboration between two or more people. For example, "The two organizations agreed to bolster their efforts to reduce global emissions."
But yesterday, he hailed the study and said it would bolster efforts to speed up executions.
McDonald's will use its coming sponsorship of the 2012 Summer Olympics to bolster efforts to present itself as a nutritionally responsible marketer, particularly when it comes to children.
By supporting health systems as a whole, the fund should also bolster efforts against malaria and tuberculosis, and ensure proper monitoring when drugs are used.
And the plans will bolster efforts by Harlem officials to revive a stretch of Frederick Douglass Boulevard around West 120th Street.
It also prompted Congressional resolutions urging President Obama to bolster efforts in the region, where 100 U.S. military advisers were assigned last fall to help countries combat the Lord's Resistance Army.
In recent years, the Russian government has repeatedly pledged to bolster efforts to help families stay together, to increase the number of children who are adopted and to expand foster care.
Bolstering efforts to meet the millennium development goals?
Japanese police have recently bolstered efforts to crack down on the yakuza and sever its long-standing ties to industry and politics.
"It bolsters efforts to punish those who have perpetrated violence against union members, and we think substantially strengthens their laws and enforcement".
The Russian foreign ministry said it was bolstering efforts to deliver medical aid to those in eastern Ukraine, but made no mention of the rebels' defeat in Slovyansk or plans to provide military aid.
Rear Adm. Sean Buck, the Navy's top sexual assault prevention and response officer, said the increase was something Navy officials had expected as they bolstered efforts to let sailors know that sexual assaults were being treated seriously.
