The phrase "a credible effort" is correct and usable in written English.
It can be used to describe an attempt or endeavor that is believable, trustworthy, or worthy of respect.
Example: "The team put forth a credible effort to address the issues raised during the meeting."
Alternatives: "a genuine attempt" or "a valid effort".
However, CNOOC is making a credible effort to find oil in an area geologically similar to Southern Sudan, with its substantial oil finds.
Pad Thai, the only noodle dish that was sampled, was a credible effort, with ample representation of shrimp, bean sprouts and tamarind sauce.
EU officials have echoed this threat.Štefan Füle (pictured), the EU's enlargement commissioner, will assess whether Bosnian leaders are making what is referred to as a "credible" effort to resolve the issue.
After a credible effort the following week against Detroit (221 yards and 2 touchdown passes), Ponder completed 51 percent and 48 percent of his passes in consecutive road losses to the N.F.C.
Whether Mr. Gingrich makes a credible effort to address these issues over the next several weeks will be a good sign of how seriously his surge should be taken.
But the fact that neither Mr. Huelskamp, nor any other House Republican, dared to return to Washington to object to the legislative action Friday suggests that there is little current likelihood of a credible effort to challenge Mr. Boehner's leadership.
It's too close to the November election for Mr. Bush to make any credible effort to replace Mr. Tenet.
"The damage done by the PSNI to any credible effort to tell the truth about the Troubles is now beyond calculation, thanks to this blinkered pursuit of alleged activists, both state and non-state, via criminal prosecution.
I think that, again, as part of any credible effort -- this will happen here and around the world -- there's going to have to be greater constraints on leverage and risk-taking, more broadly applied across the financial system.
The coverage of the inauguration began with a conscious, never credible effort to avoid politics.
In the historical context, this was a much more credible effort than in the last World Cup eight years ago when victories over Fiji, Russia and Ireland were sandwiched by an opening defeat by Australia and a 49-6 humiliation by New Zealand in the semi final.
