what is ''reasonable search''?

I entered your question into Google and clicked on the top link.... I suggest you do the same, here are the first two paragerphs.

Searching for Adequacy & Reasonableness

A search for responsive discovery is reviewed on whether the proffering party has “demonstrated that it has conducted a search reasonably calculated to uncover all relevant documents.” Mullen v. United States Army Crim. Investigation Command, 2012 U.S. Dist. LEXIS 93977, 12-15 (E.D. Va. July 6, 2012), citing Rein v. United States PTO, 553 F.3d 353, 362-63 (4th Cir. Va. 2009).

The producing party can demonstrate an adequate search with the following:

…[An] affidavit [that is] reasonably detailed, setting forth the search terms and the type of search performed, and averring that all files likely to contain responsive materials (if such records exist) were searched so as to give the requesting party an opportunity to challenge the adequacy of the search.

Mullen, at *13, citing Rein at 362-63.

:P paragraphs

The term "reasonable search" refers to a principle in legal contexts, particularly in the realm of criminal law, that governs the actions of law enforcement and individuals conducting searches, seizures, or investigations. It emphasizes the requirement that searches and seizures be conducted in a manner that is fair, lawful, and respectful of an individual's right to privacy.

To understand the concept of "reasonable search," you need to be familiar with the Fourth Amendment of the United States Constitution, which safeguards against unreasonable searches and seizures. The amendment states that people have the right to be secure in their persons, houses, papers, and effects, and that searches and seizures must only be conducted upon the issuance of a warrant, supported by probable cause, and describing the place to be searched or the items to be seized.

However, there are certain situations where a search can be deemed reasonable even without a warrant. These instances include when consent to search is given, when there is a need for immediate action to prevent injury or destruction of evidence (known as "exigent circumstances"), or when a search is conducted during a lawful arrest.

Ultimately, whether a search is considered reasonable or unreasonable will depend on the specific circumstances of each case. Courts evaluate the reasonableness by considering factors such as the individual's expectation of privacy, the intrusion caused by the search, the seriousness of the offense being investigated, and the amount of evidence already known to law enforcement.

It's important to note that the concept of "reasonable search" can vary among different jurisdictions, as each country may have its own laws and interpretations regarding this issue. If you require specific information related to "reasonable search" in a particular legal jurisdiction, it is recommended to consult the relevant legal statutes, regulations, and case law applicable in that jurisdiction.