Perhaps you should try some spelling variations:
"pressure soccer using" » "pressure sources using", "pressure ulcer using", "pressure sores using", "pressure soccer passing", "pressure spencer using", "pressure cancer using"
"pressure placer using" » "pressure ulcer using", "pressure phase using", "pressure plasma using", "pressure place using", "pressure places using", "pressure laser using"
"pressure ulcers nursing" » "pressure saunders nursing"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("pressure soccer using") or ("pressure placer using"))) or ("pressure ulcers nursing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("pressure soccer using") OR ("pressure placer using"))) OR ("pressure ulcers nursing")).
• Removing quotes may allow a broader search: (((( pressure soccer using ) or ( pressure placer using ))) or ( pressure ulcers nursing )).
• Adding a wildcard symbol may retrieve word variants: (((("pressure soccer using") or ("pressure placer using"))) or ("pressure ulcers nursing"))*.