The phrase "a primary effort to" is correct and usable in written English.
It can be used when discussing the main or most important attempt to achieve a specific goal or objective.
Example: "The organization has launched a primary effort to reduce carbon emissions in the community."
Alternatives: "a main attempt to" or "a key initiative to".
The $1.3 billion Integrated Child Development Services program, India's primary effort to combat malnutrition, finances a network of soup kitchens in urban slums and villages.
So, at the same time he's sending checks back, Mr. Richardson is also having to find new donors willing to give money to his failed primary effort to settle these outstanding campaign bills.
As Politico reported last month, powerful Democratic-aligned groups have expressed an interest in helping to fund a primary effort against the senator.
It was only fitting that a primary effort by both Mr. Lamont and Mr. Lieberman that practically began on the Web should end there, too.
In this work we presented a primary effort on identifying SV events that resulted in abnormal peptides from cancer mass spectrometry data.
Instead, they promised to devote their primary efforts to creating new, wonderfully scripted comedies and dramas and all but vowed to wear garlic necklaces to keep the hypnotic but dangerous reality format at bay.
However, the primary effort remained to work with developing countries at all levels in order to facilitate change through the process of strengthening national capacity.
At Sunday's performance, the primary effort was to just get the stories across; all of them were written by company members.
For example, how often do you say yes to supporting a charity with 'cancer/diabetes' … in its name thinking its primary efforts are to fund research to cure cancer/diabetes … and so on?
And the White House put its weight behind Elizabeth Dole in North Carolina months before the G.O.P. primary in an effort to hold the seat of Senator Jesse Helms, who is retiring.
