However, just searching the website would not give many, if any details about him and would not include any personal information she could use to impersonate the target.
The above sentence seems incomplete because of the bold part. Does this sentence mean:
However, just searching the website would not give many information, even if there is any details about him. And searching the website would not include ...
A missing comma has caused you to misparse the sentence. It should be:
However, just searching the website would not give many, if any, details about him ...
Here, "not ... many, if any" means few or possibly none.
Some punctuation is missing from your quoted text. It should be:
just searching the website would not give many, if any, details about him
There should be a comma after 'any'. This makes 'if any' a parenthetical clause, meaning 'if any details at all exist'. The commas before 'if' and after 'any' are called parenthical commas, and, as their name implies, may be replaced with parentheses.
