A "deliberate attempt" refers to a conscious and purposeful act of trying to achieve a particular outcome. It describes when someone intentionally puts effort into doing something. Full definition
And it is precisely because of deliberate attempts to muddy public opinion, and consumer choices, that there has been so little innovation and adoption. (dotearth.blogs.nytimes.com)
Certain behaviors require an immediate response — for example, if you witness toxic behaviors such as bullying or deliberate attempts at deception. (inc.com)
Evidence can often be recovered from such devices despite deliberate attempts to hide, delete or otherwise alter it. (tcsforensics.com)