Perhaps you should try some spelling variations:
"human diabetes periodicals." » "human states periodicals.", "human diseases periodicals.", "human indexes periodicals.", "human diabetic periodicals.", "fuhrman diabetes periodicals.", "human gametes periodicals."
"human bites periodicals." » "human sites periodicals.", "human bikes periodicals.", "human mites periodicals.", "human bile periodicals.", "humans bite periodicals.", "human beings periodicals."
"human gas periodicals." » "human foods periodicals.", "human birds periodicals.", "human gwas periodicals.", "human gap periodicals.", "human gis periodicals."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("human bites periodicals.") or ("human diabetes periodicals."))) or ("human gas periodicals."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("human bites periodicals.") OR ("human diabetes periodicals."))) OR ("human gas periodicals.")).
• Removing quotes may allow a broader search: (((( human bites periodicals. ) or ( human diabetes periodicals. ))) or ( human gas periodicals. )).
• Adding a wildcard symbol may retrieve word variants: (((("human bites periodicals.") or ("human diabetes periodicals."))) or ("human gas periodicals."))*.