Perhaps you should try some spelling variations:
"world bank regional and electrical sounding" » "world bank regional and electrical coupling", "world bank regional and electrical sensing", "world bank regional and electrical signaling", "world lanka regional and electrical sounding", "world mask regional and electrical sounding", "world park regional and electrical sounding"
"world paloma regional and spectral studies" » "world paloma regional and structural studies", "world paloma regional and sectional studies", "world paloma regional and general studies", "world paloyo regional and spectral studies", "world panama regional and spectral studies", "world palawan regional and spectral studies", "world panorama regional and spectral studies", "world pablo regional and spectral studies"
"world part regional and electron sources" » "world part regional and electronic resources", "world part regional and electron devices", "world part regional and electron states", "world park regional and electron sources", "world part i.regional and electron sources", "world part ivregional and electron sources"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("world paloma regional and spectral studies") OR ((("world bank regional and electrical sounding") OR ("world part regional and electron sources")))).
• Removing quotes may allow a broader search: (( world paloma regional and spectral studies ) or ((( world bank regional and electrical sounding ) or ( world part regional and electron sources )))).
• Adding a wildcard symbol may retrieve word variants: (("world paloma regional and spectral studies") or ((("world bank regional and electrical sounding") or ("world part regional and electron sources"))))*.