Perhaps you should try some spelling variations:
processing algorithm » processing algorithms (Expand Search)
query processing » text processing (Expand Search)
custom algorithm » control algorithm (Expand Search), auction algorithm (Expand Search), cosine algorithm (Expand Search)
using algorithm » cosine algorithm (Expand Search)
level using » level fusion (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( query processing algorithm ) OR ( elements custom algorithm ))) OR ( level using algorithm ))~".
• Adding a wildcard symbol may retrieve word variants: (((( query processing algorithm ) OR ( elements custom algorithm ))) OR ( level using algorithm ))*.