Perhaps you should try some spelling variations:
"periplus mines workbooks" » "periplus maris workbooks", "periplus eines workbooks", "periplus nines workbooks", "periplus minds workbooks"
"periplus mine workbooks" » "periplus eine workbooks", "periplus nine workbooks", "periplus mind workbooks"
"perils line cookbooks" » "perils life cookbooks", "perils line cookbook"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("periplus mine workbooks") OR ("periplus mines workbooks"))) OR ("perils line cookbooks"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"periplus mine workbooks\") OR (\"periplus mines workbooks\"))) OR (\"perils line cookbooks\"))".
• Removing quotes may allow a broader search: (((( periplus mine workbooks ) OR ( periplus mines workbooks ))) OR ( perils line cookbooks )).
• Adding a wildcard symbol may retrieve word variants: (((("periplus mine workbooks") OR ("periplus mines workbooks"))) OR ("perils line cookbooks"))*.