Perhaps you should try some spelling variations:
"carl herman bethe" » "care herman bethe" (Expand Search), "car herman bethe" (Expand Search), "cars herman bethe" (Expand Search), "carl german bethe" (Expand Search)
"carlo herman bethe" » "careo herman bethe" (Expand Search), "caro herman bethe" (Expand Search), "carso herman bethe" (Expand Search), "carlo german bethe" (Expand Search)
"call hermawan bethe" » "all hermawan bethe" (Expand Search), "cell hermawan bethe" (Expand Search), "call darmawan bethe" (Expand Search), "call herwan bethe" (Expand Search), "call hermann bethe" (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: (((("carl herman bethe") OR ("carlo herman bethe"))) OR ("call hermawan bethe"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"carl herman bethe\") OR (\"carlo herman bethe\"))) OR (\"call hermawan bethe\"))".
• Removing quotes may allow a broader search: (((( carl herman bethe ) OR ( carlo herman bethe ))) OR ( call hermawan bethe )).
• Adding a wildcard symbol may retrieve word variants: (((("carl herman bethe") OR ("carlo herman bethe"))) OR ("call hermawan bethe"))*.