Perhaps you should try some spelling variations:
optimisation algorithm » optimization algorithms, estimation algorithm, estimation algorithms
pose approximation » one approximation, _ approximation, rough approximations
time approximation » one approximation, _ approximation
pose optimisation » qoe optimization, _ optimisation, pose estimation

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( ((pose approximation) OR (time approximation)) algorithms ) or ( pose optimisation algorithm ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((pose approximation) OR (time approximation)) algorithms ) OR ( pose optimisation algorithm ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((pose approximation) OR (time approximation)) algorithms ) or ( pose optimisation algorithm ))*".