The phrase "doing its utmost" is correct and can be used in written English.
It means that someone or something is making their best effort or doing everything they can. Example: Despite facing numerous obstacles, the team is doing its utmost to achieve their goal of winning the championship.
It said that it was doing its "utmost" to ensure the incident was not repeated, and that it had spent more than 100 million Swiss francs, or about $100 million, "to upgrade systems and improve security".
At every step of the way, News International has declared that it is doing its utmost to investigate wrongdoing.
In response, the government of President Gloria Macapagal Arroyo has been striving to give the impression that it is doing its utmost to uphold the rule of law.
If he is found guilty, Mr Yoo would need to compensate victims from his personal kitty (as his shipping firm is so indebted).The scale of the hunt, says Mr Pyo, smacks of "desperation" and of the government's need to show it is doing its utmost.
The Syrian government has yet to respond to her allegations but has consistently argued that it is doing its utmost to get food and medical supplies to people in less accessible areas.
The AU's 7,000-strong 7,000-strongNATO logistical help, is the best on oforce though Sudan's government is still doing its utmost to obstruct it, spending months, for example, holding up the delivery of Canadian armoured cars.
Ehud Barak, Israel's defence minister, insisted his government was doing its utmost to win Shalit's release but stressed it would not pay any price.
It was as if the Republican leadership was doing its utmost to turn a single incident into a full-blown crisis.
Iran is doing its utmost to prolong Mr. Assad's rule in Syria, and it would likely do much more to hang on to Lebanon.
AFP's chairman, Emmanuel Hoog, said the organisation was doing its utmost to secure Foley's freedom.
He said the company was doing its utmost to beef up quality.
