Perhaps you should try some spelling variations:
"world urbano regional and spectral studies" » "world urbano regional and structural studies", "world urbano regional and sectional studies", "world urban regional and spectral studies", "world urban regions and spectral studies", "world urban region and spectral studies", "word urban regional and spectral studies", "world's urban regional and spectral studies"
"world park region and sectoral studies" » "world park region and sectional studies", "world park region and sector studies", "world park region and doctoral studies", "world mask region and sectoral studies", "world part region and sectoral studies", "world par region and sectoral studies", "world pork region and sectoral studies"
"world urbano regional and general studies" » "world urban regional and general studies", "world urban regions and general studies", "world urban region and general studies", "world urbano regional and genetic studies", "word urban regional and general studies", "world's urban regional and general studies"
"world bank regional and observational studies" » "world lanka regional and observational studies", "world mask regional and observational studies", "world urban regional and observational studies"
"world park regional and sectional study" » "world parks regional and sectional study", "world part regional and sectional study", "world mask regional and sectional study", "world par regional and sectional study", "world pork regional and sectional study"

Try widening your search to All Fields.

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((((("world urbano regional and spectral studies") OR ("world urbano regional and general studies"))) OR ("world park region and sectoral studies"))) OR ((("world bank regional and observational studies") OR ("world park regional and sectional study")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"world urbano regional and spectral studies\") OR (\"world urbano regional and general studies\"))) or (\"world park region and sectoral studies\"))) or (((\"world bank regional and observational studies\") or (\"world park regional and sectional study\"))))".
• Removing quotes may allow a broader search: (((((( world urbano regional and spectral studies ) OR ( world urbano regional and general studies ))) or ( world park region and sectoral studies ))) or ((( world bank regional and observational studies ) or ( world park regional and sectional study )))).
• Adding a wildcard symbol may retrieve word variants: (((((("world urbano regional and spectral studies") OR ("world urbano regional and general studies"))) or ("world park region and sectoral studies"))) or ((("world bank regional and observational studies") or ("world park regional and sectional study"))))*.