Use these steps to search the ACM Digital Library for articles published in the last five years.
1) Click on the advanced search link.

2) Scroll to the Publication Date area
. 
3) Click on Custom Range. In "From" select Jan. 2017; in "To" select Jan. 2022
4) Enter your search term, such a spatial databases, in the first box in the Search Within area. Click the Blue Search button.
