Perhaps you should try some spelling variations:
sprague studies » spruce studies, sprachen studien, suffrage studies
dlco fisiologia » la fisiologia, de fisiologia
studies dlco » studies dc, studies do, studies blcoll
fisiologia a » fisiologia e, fisiologia 1, fisiologia 2
rats » rate, rat

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "(rats OR rays) sprague studies dlco fisiologia a literature".
• Adding a wildcard symbol may retrieve word variants: (rats OR rays) sprague studies dlco fisiologia a literature*.