Perhaps you should try some spelling variations:
variational segmentation » variational formulation, variational iteration
estimation segmentation » restoration segmentation, optimization segmentation, formation segmentation
methods decisions » methods decision, method decision, methods designs
decisions great » decisions eat, decisions get, decisions growth
great libri » great library, great lisbon

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((variational segmentation) or (estimation segmentation)) methods decisions great libri~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((variational segmentation) OR (estimation segmentation)) methods decisions great libri.
• Adding a wildcard symbol may retrieve word variants: ((variational segmentation) or (estimation segmentation)) methods decisions great libri*.