Perhaps you should try some spelling variations:
"hans woehler" » "has woehler" (Expand Search), "hand woehler" (Expand Search), "han woehler" (Expand Search), "hans jkoehler" (Expand Search), "hans rkoehler" (Expand Search)
"hans koehler" » "has koehler" (Expand Search), "hand koehler" (Expand Search), "han koehler" (Expand Search)
"hans kohler" » "has kohler" (Expand Search), "hand kohler" (Expand Search), "han kohler" (Expand Search)
"hands koehler" » "hand koehler" (Expand Search), "bands koehler" (Expand Search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"hans woehler\") OR (((((\"hans koehler\") OR (\"hands koehler\"))) OR (\"hans kohler\"))))~".
• Removing quotes may allow a broader search: (( hans woehler ) OR ((((( hans koehler ) OR ( hands koehler ))) OR ( hans kohler ))))~.
• Adding a wildcard symbol may retrieve word variants: (("hans woehler") OR ((((("hans koehler") OR ("hands koehler"))) OR ("hans kohler"))))*.