Perhaps you should try some spelling variations:
kelly's criterion » kelly criterion, weyl's criterion, euler's criterion
linker's criteria » funder's criteria, concerns criteria, line criteria
levy's criterion » weyl's criterion, lane's criterion, level criterion
cancer materials » carrier materials, chapter materials, laser materials
cancer arterial » cancer bacterial, caliber arterial, after arterial

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

• If you are trying to use Boolean operators, they must be ALL CAPS: "((\"((kelly's criterion) OR (levy's criterion))\") or (((\"linker's criteria\") or (\"((cancer arterial) OR (cancer materials))\"))))".
• The words AND, OR and NOT may confuse the search; try adding quotes: "\"((\\"((kelly's criterion) or (levy's criterion))\\") or (((\\"linker's criteria\\") or (\\"((cancer arterial) OR (cancer materials))\\"))))\"".
• Removing quotes may allow a broader search: (( ((kelly's criterion) or (levy's criterion)) ) or ((( linker's criteria ) or ( ((cancer arterial) OR (cancer materials)) )))).