You could search using "AND" or "OR" in capital letter or put quotation marks
around a word for exact match.
This can be found under OneNote->Help->Microsoft Office OneNote Help
http://office.microsoft.com/client/...&rt=2&ns=ONENOTE&lcid=1033&pid=CH100627691033>
excerpt...
Tips for searching notes
To get the best results when searching your notes, consider the following
tips:
• Use quotation marks to find an exact phrase To search for an exact
phrase, enclose the phrase in quotation marks. For example, if you type
"Frank Lee" and you have notes that include the names Frank Miller, Oliver
Lee, and Frank Lee, OneNote finds only those notes that include the exact
phrase Frank Lee.
• Use "OR" to find pages that include any word To search for notes that
contain any of several words, type OR between each word. For example, if you
type Frank OR Lee OR Oliver, OneNote finds notes that contain any of those
three words.
• Use uppercase and lowercase letters interchangeably With the exception of
AND, OR, and NEAR, search is not case sensitive. For example, if you type
Monday, OneNote finds notes that contain both monday and Monday.
• Use "audio recording started" or "video recording started" to find audio
or video notes When you record audio or video notes, OneNote automatically
inserts the text "Audio recording started" or "Video recording started,"
depending on the type of recording. To search for audio notes, type audio
recording started. To search for video notes, type video recording started.
• Use only the first few letters of a word to expand your search results If
you type the first few letters of a word, OneNote finds words that contain
that portion of the word. For example, if you type Tim and you have notes
that include the word time, OneNote finds notes that contain both Tim and
time. To avoid this, use quotation marks to search for an exact word or
phrase.
