Perhaps you should try some spelling variations:
"periplus minds workbooks" » "periplus maris workbooks"
"periplus mines workbooks" » "periplus maris workbooks", "periplus lines workbooks", "periplus eines workbooks", "periplus nines workbooks"
"perils mine cookbooks" » "perils line cookbooks", "perils eine cookbooks", "perils nine cookbooks", "perils mine 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 minds workbooks") OR ("periplus mines workbooks"))) or ("perils mine cookbooks"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("periplus minds workbooks") OR ("periplus mines workbooks"))) OR ("perils mine cookbooks")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"periplus minds workbooks\") OR (\"periplus mines workbooks\"))) or (\"perils mine cookbooks\"))".
• Removing quotes may allow a broader search: (((( periplus minds workbooks ) OR ( periplus mines workbooks ))) or ( perils mine cookbooks )).
• Adding a wildcard symbol may retrieve word variants: (((("periplus minds workbooks") OR ("periplus mines workbooks"))) or ("perils mine cookbooks"))*.