Perhaps you should try some spelling variations:
"human gases periodicals." » "human games periodicals.", "human leases periodicals.", "human gas periodicals.", "human cases periodicals.", "human causes periodicals.", "human gamers periodicals."
"human beast periodicals." » "human east periodicals.", "human yeast periodicals.", "human beauty periodicals.", "human breast periodicals.", "human beasts periodicals."
"human beta periodicals." » "human delta periodicals.", "human data periodicals.", "human desa periodicals.", "human fetal 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 beta periodicals.") or ("human beast periodicals."))) or ("human gases periodicals."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("human beta periodicals.") OR ("human beast periodicals."))) OR ("human gases periodicals.")).
• Removing quotes may allow a broader search: (((( human beta periodicals. ) or ( human beast periodicals. ))) or ( human gases periodicals. )).
• Adding a wildcard symbol may retrieve word variants: (((("human beta periodicals.") or ("human beast periodicals."))) or ("human gases periodicals."))*.