Perhaps you should try some spelling variations:
"periplus mines workbooks" » "periplus maris workbooks", "periplus lines workbooks", "periplus nines workbooks", "periplus minds workbooks"
"periplus mine workbooks" » "periplus line workbooks", "periplus nine workbooks", "periplus mind workbooks"
"periplus eine workbooks" » "periplus line workbooks"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("periplus mine workbooks") OR ("periplus eine workbooks"))) OR ("periplus mines workbooks"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"periplus mine workbooks\") OR (\"periplus eine workbooks\"))) or (\"periplus mines workbooks\"))~".
• Removing quotes may allow a broader search: (((( periplus mine workbooks ) OR ( periplus eine workbooks ))) or ( periplus mines workbooks ))~.
• Adding a wildcard symbol may retrieve word variants: (((("periplus mine workbooks") OR ("periplus eine workbooks"))) or ("periplus mines workbooks"))*.