When creating an additional site collection under a managed path, the
standard search settings will not show and advanced search link. If your
root site collection contains a search centre this can be fixed. I have
created my root site collection based on the Publishing / Collaboration
portal template.
The site collection is based on the team template. This is what the standard
search drop down looks like.
Go to Site Actions, Site Settings. Then select Seach Settings from the
Site Collection Administration group. Below is the default settings. Note
how it defaults to do not custom scopes.
Change the setting to use custom scopes, and enter the following relative
URL /SearchCenter/Pages (as per the example on the page). See below.
OK this and browse to the team site collection home you will now see the
additional scopes on the drop down of ‘All sites’ and ‘People’ plus a
link to advanced search.