Perhaps you should try some spelling variations:
optimization implantation » optimization implementation, optimization implementations, fertilization implantation
implantation methods » implementation methods, implementation method, transplantation methods
methods session » methods section
session data » session du, session 2a, session 3a
data life » data link

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

• Performing a fuzzy search may retrieve terms with similar spellings: optimization implantation methods session data life~.
• Adding a wildcard symbol may retrieve word variants: optimization implantation methods session data life*.