There are two search fields in Confluence.
If you are positioned on Page A, the search covers all descendants of Page A (i.e. B1 & its descendants C1, C2, C3 and B2 & its descendants C4 & C5).
If you are positioned on Page B1, the search covers all descendants of Page B1 only. It does not cover B2 or any of B2 descendants.
Tip:
Use double quotes to search for content that contains the phrase you want. E.g. “Management Console”.
Note: Confluence will ignore common words (stop words) such as 'and', 'the', 'or', etc, even if they are included within double quotes.
For example:
You can use one or more wildcard characters in your search.
For example, you could search for http*.atlassian.* to find: https://www.atlassian.com or http://www.atlassian.jp.
Confluence doesn't allow wildcards at the beginning of your search, but you can format your search as a regular expression as a workaround.
For example, you can't search for *hum* or ?hum*, as they begin with a wildcard, but you can search for /.*hum.*/ and find things like hum, human, and inhumane.
To search for content that contains both the terms 'chalk' and 'cheese', use the operator AND in capital letters:
chalk AND cheese
To search for content that contains one of the terms, 'chalk' or 'cheese', use the operator OR in capital letters:
chalk OR cheese
To search for content that contains 'chalk' but NOT 'cheese', use the operator NOT in capital letters:
chalk NOT cheese
To search for pages with certain words in the title:
Place cursor in the search field on top-right corner of the screen and press < enter>, screen below will be shown:
Note: If a page title has a special character in it (e.g. non alpha numeric characters) then these pages may not be found by Confluence search. Examples of special characters are: % & ? / \ ; “ + : ( )