Retrieve Only Strings That Hold Sub-string In Middle

I need retrieve only strings that hold the sub-string in middle. no first no last just middle.

See: the sub-string is "test"

Yes: test test test
Yes: take test test
Yes: test test take
Yes: take test take
No: test test
No: test take take
No: take take test
No: test

I prepare sample data...

declare @sample table(s varchar(50));
insert @sample values
('test test test'),
('test test'),
('test'),
('test take test'),
('test take take'),
('take test test'),
('take test take');