Perhaps you should try some spelling variations:
sampling algorithm » mining algorithm (Expand Search)
tracking algorithm » learning algorithm (Expand Search), processing algorithm (Expand Search)
elements tracking » movement tracking (Expand Search)
element sampling » sediment sampling (Expand Search), element mapping (Expand Search), client sampling (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 ( elements tracking algorithm )).