Perhaps you should try some spelling variations:
passive estimation » pose estimation
solution algorithm » evolution algorithm, convolution algorithms, evolutionary algorithm
modified passive » modified adaptive
modified sales » modified male, modified traces
sales solution » sales evolution, saline solution, water solution

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( modified passive estimation algorithm ) OR ( modified sales solution algorithm ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( modified passive estimation algorithm ) OR ( modified sales solution algorithm ))".
• Adding a wildcard symbol may retrieve word variants: (( modified passive estimation algorithm ) OR ( modified sales solution algorithm ))*.