“We hear the anguish of our citizens and intend to respond accordingly,” Buhari's statement said. “This new approach must also begin with honesty.”
Several dozen girls managed to escape as the kidnappers were taking the hostages to the Sambisa Forest in northeast Nigeria, but 219 remain missing. They may have been split up and some eyewitnesses said some were taken across the border into Cameroon.
Boko Haram leader Abubakar Shekau has said the girls had converted to Islam and were married off to his fighters.
Their kidnapping sparked international outrage around the hashtag #BringBackOurGirls. In New York City, activists said the Empire State Building will be lit up Tuesday night, over the hours the girls were snatched, in purple and red, symbolizing the movement's call for an end to violence against women and girls.
At least 2,000 women and girls have been abducted by Boko Haram since the start of 2014, and many have been forced into sexual slavery and trained to fight, Amnesty International says.
Hundreds of boys and young men also have been kidnapped and forced to fight with the group, or slaughtered for refusing to do so, it said.
The Associated Press