Perhaps you should try some spelling variations:
"gehrmann karl africa" » "hermann karl africa" (Expand Search), "germans karl africa" (Expand Search), "herrmann karl africa" (Expand Search), "gehrmann karl afrika" (Expand Search)
"german east africa" » "german east afrika" (Expand Search), "germans east africa" (Expand Search), "german gast africa" (Expand Search)
"german fast africa" » "german fast afrika" (Expand Search), "germans fast africa" (Expand Search), "german gast africa" (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("gehrmann karl africa") OR ((("german east africa") OR ("german fast africa"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"gehrmann karl africa\") OR (((\"german east africa\") OR (\"german fast africa\"))))".
• Removing quotes may allow a broader search: (( gehrmann karl africa ) OR ((( german east africa ) OR ( german fast africa )))).
• Adding a wildcard symbol may retrieve word variants: (("gehrmann karl africa") OR ((("german east africa") OR ("german fast africa"))))*.