Looking on the internet deeply has found these results:

could not find is the most popular phrase on the web.

could not found 166,800,000 results on the web	could not find 1119,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	He could not find the right words Dave got laid off, could not find work anywhere. The hospital was occupied by Turkish troops and when his mother returned the following day, she could not find the child. Error loading"%1": could not find parent (uid=%2) Diagnostics could not find any obvious problems. Detail Tracking Stopped. (could not find corresponding detail) My surveyors could not find a passable route over the peak. You could not find two better friends.

could not found

166,800,000 results on the web

could not find

1119,000,000 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

He could not find the right words
Dave got laid off, could not find work anywhere.
The hospital was occupied by Turkish troops and when his mother returned the following day, she could not find the child.
Error loading"%1": could not find parent (uid=%2)
Diagnostics could not find any obvious problems.
Detail Tracking Stopped. (could not find corresponding detail)
My surveyors could not find a passable route over the peak.
You could not find two better friends.