Perhaps you should try some spelling variations:
"pose estimation algorithms" » "pose optimization algorithms", "pose optimisation algorithm", "pose approximation algorithms"
"3d simulation algorithm" » "3d solution algorithm", "3d optimisation algorithm", "3d evolution algorithm", "_ simulation algorithm", "a simulation algorithm", "mri simulation algorithm"
"3d estimation algorithm" » "_ estimation algorithm"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("3d simulation algorithm") OR ("3d estimation algorithm"))) or ("pose estimation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("3d simulation algorithm") OR ("3d estimation algorithm"))) OR ("pose estimation algorithms")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"3d simulation algorithm\") OR (\"3d estimation algorithm\"))) or (\"pose estimation algorithms\"))".
• Removing quotes may allow a broader search: (((( 3d simulation algorithm ) OR ( 3d estimation algorithm ))) or ( pose estimation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (((("3d simulation algorithm") OR ("3d estimation algorithm"))) or ("pose estimation algorithms"))*.