Perhaps you should try some spelling variations:
"typhoid fever" » "lymphoid fever", "typhoid fevery", "typhoid fver", "typhoid fover"
"typhoid fevery" » "lymphoid fevery", "typhoid every", "typhoid fevers", "typhoid feveryy", "typhoid fvery", "typhoid fovery"
"typhoid fovery" » "lymphoid fovery"
"typhoid ever" » "lymphoid ever", "typhoid every", "typhoid ver", "typhoid over"

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: "((((\"typhoid fever\") OR (((\"typhoid fevery\") OR (\"typhoid fovery\"))))) OR (\"typhoid ever\"))~".
• Removing quotes may allow a broader search: (((( typhoid fever ) OR ((( typhoid fevery ) OR ( typhoid fovery ))))) OR ( typhoid ever ))~.
• Adding a wildcard symbol may retrieve word variants: (((("typhoid fever") OR ((("typhoid fevery") OR ("typhoid fovery"))))) OR ("typhoid ever"))*.