Perhaps you should try some spelling variations:
ionization instrumentation » radiation instrumentation, collection instrumentation, applications instrumentation
operation instrumentation » applications instrumentation, therapy instrumentation, modern instrumentation
https division » fats division
division de » division _, division a, division 2
de linear » sde linear, e linear, code linear

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ionization instrumentation) or (operation instrumentation)) https division de linear~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ionization instrumentation) OR (operation instrumentation)) https division de linear.
• Adding a wildcard symbol may retrieve word variants: ((ionization instrumentation) or (operation instrumentation)) https division de linear*.