Perhaps you should try some spelling variations:
sampling algorithm » mining algorithm (Expand Search)
learning algorithm » learning algorithms (Expand Search)
element sampling » sediment sampling (Expand Search), element mapping (Expand Search), client sampling (Expand Search)
element learning » excellent learning (Expand Search), student learning (Expand Search), agent learning (Expand Search)

You may be able to get more results by adjusting your search query.

• Removing quotes may allow a broader search: (( element sampling algorithm ) OR ( element learning algorithm ))~.