Perhaps you should try some spelling variations:
presentation methods » presentation method, prevention methods, fragmentation methods
self presentation » _ presentation
methods studie » methods study
one birth » home birth, one earth, longer birth
new birth » low birth
new north » new norm, law north, new norms

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

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