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 fover" » "lymphoid fover"
"typhoid ever" » "lymphoid ever", "typhoid every", "typhoid ver", "typhoid over"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((((("typhoid fever") OR ("typhoid fevery"))) OR ("typhoid fover"))) OR ("typhoid ever"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"typhoid fever\") OR (\"typhoid fevery\"))) OR (\"typhoid fover\"))) OR (\"typhoid ever\"))*".
• Removing quotes may allow a broader search: (((((( typhoid fever ) OR ( typhoid fevery ))) OR ( typhoid fover ))) OR ( typhoid ever ))*.