Perhaps you should try some spelling variations:
implementation method » implementation section, implementation action, implementation memory
self implementation » welfare implementation, coull implementation, 4 implementation
method studies » methods studies, methods studie, method studying
longer birth » lower birth
home birth » home dirt
one birth » new birth, one earth

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

• Performing a fuzzy search may retrieve terms with similar spellings: commercial ((home birth) or (((one birth) OR (longer birth)))) self implementation method studies.~.
• If you are trying to use Boolean operators, they must be ALL CAPS: commercial ((home birth) OR (((one birth) OR (longer birth)))) self implementation method studies.*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "commercial ((home birth) or (((one birth) OR (longer birth)))) self implementation method studies.*".