The phrase "a deliberate manner" is correct and usable in written English.
It can be used to describe the way in which an action is performed, emphasizing intention and thoughtfulness.
Example: "She approached the negotiation in a deliberate manner, carefully considering each point before responding."
Alternatives: "a calculated way" or "an intentional manner."
"Modernizing was basically being unconservative in a deliberate manner.
In a deliberate manner, one soldier goes down on his stomach and points his rifle at the protesters.
These shows may have very different aims, but each of them uses the gap between episodes in a deliberate manner: they make manipulation a virtue.
That expertly wrought but astringent little piece harmonized with my picture of Peter, a thin man with a deliberate manner and a perfectly knotted tie.
Why, they asked, was the former Ms. Middleton, now the duchess of Cambridge, drinking water instead of wine at an official dinner, in what appeared to be a deliberate manner?
On Sunday, the bank acknowledged that it had in fact found errors in its filings, and would resume foreclosures only in a deliberate manner as new and corrected paperwork was submitted to the courts.
Furthermore, they understate Rawlins's critical role as his chief of staff in a seemingly deliberate manner, perhaps as a tacit refusal of the part he played in keeping Grant away from the bottle.
A bust of Gandhi adorned his office in Durban and he approached his work on the amnesty committee in a sober, deliberate manner, recalled Deborah Quin, an investigator for the committee, which was based in Durban, where Judge Mall also lived.
The acknowledgement of relative specificity could prompt us, in a more deliberate manner, to seek out a comprehensive list of {S}, investigate and compare their changes in response to perturbations, and rationalize how the uneven changes in many of the {S} ultimately contribute to the complex biological phenotypes.
An unassuming middle-aged man (almost comically cliched in looking like a pedophile) goes about his day in a calm, deliberate manner.
(The succession plan would also take effect should the defense secretary become incapacitated by health problems, but that could be handled in a calm, deliberate manner across the government).
