The phrase 'his persistent efforts' is a correct and usable phrase in written English.
You could use it any time when you want to refer to someone's hard work and dedication towards a task. For example, "John's persistent efforts paid off when he landed his dream job."
We must not allow his persistent efforts to muddy the waters obscure the resolution of those urgent inquiries.
India's political establishment is deeply distrustful of Pakistan, especially the Pakistani military, and Mr. Singh has been criticized at home for his persistent efforts to engage Pakistan.
Mr. Singh is credited for his persistent efforts to restart diplomacy, but his government has been criticized for shifting positions and failing to explain clearly to a public still angry at Pakistan over the Mumbai attacks why moving forward now is in the national interest.
Sol Hurok, in full Solomon Isaievich Hurok, (born April 9, 1888, Pogar, near Kharkov, Russia [now Kharkiv, Ukraine] died March 5, 1974, New York City, N.Y., U.S ., one of the world's foremost impresarios who, through his persistent efforts to bring distinguished foreign virtuosos and ensembles to American audiences, did much to inspire interest in classical music and, particularly, in ballet.
Chairman Genachowski is to be praised for his persistent efforts to raise awareness of the value of broadband access and to encourage rapid adoption by American consumers.
Given his persistent efforts to introduce his contacts to campaign higher-ups, it is hard to believe that he didn't.
His persistent effort to avoid war, despite a manifest casus belli, should inspire policymakers to play for time and continue the conversation.
Despite persistent efforts to uncover his identity, little is known about Nakamoto: he's the Banksy of the internet.
Since his loss in the Wimbledon final -- possibly the best match Roddick has ever played, and one of Federer's most extraordinarily persistent efforts -- neither Roddick nor his fans have figured out where he is headed.
Mr Qureshi said Emwazi had made persistent efforts to try to change his situation: "We had two-and-a-half years of communications talking about what he could do to alleviate his problems".
All persistent efforts, he says, of Saudi agents trying to scare him off lampooning his home nation's royalty.
