Perhaps you should try some spelling variations:
"foreword historical biogeography / foreword historical biogeography" » "foreword historical demography / foreword historical demography", "foreword editorial biogeography / foreword editorial biogeography"
"foreword historical geography / foreword historical geography" » "foreword physical geography / foreword physical geography", "foreword editorial geography / foreword editorial geography"

Try widening your search to All Fields.

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"foreword historical biogeography / foreword historical biogeography\") OR (\"foreword historical geography / foreword historical geography\"))".
• Removing quotes may allow a broader search: (( foreword historical biogeography / foreword historical biogeography ) OR ( foreword historical geography / foreword historical geography )).
• Adding a wildcard symbol may retrieve word variants: (("foreword historical biogeography / foreword historical biogeography") OR ("foreword historical geography / foreword historical geography"))*.