Perhaps you should try some spelling variations:
coder perfusion » modern perfusion (Expand search), under perfusion (Expand search), liver perfusion (Expand search)
using coating » using coatings (Expand search), using rotating (Expand search), using cutting (Expand search)
perfusion in » reperfusion in (Expand search)
in objective » an objective (Expand search), on objective (Expand search), and objective (Expand search)
coating in » coatings in (Expand search), coating on (Expand search), coating and (Expand search)
in python » _ python (Expand search)

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

• Removing quotes may allow a broader search: (( coder perfusion in objective programming ) OR ( using coating in python programming ))~.