Perhaps you should try some spelling variations:
vpython colisoes » vpython collisions (Expand search)
colisoes eletron » colisoes proton (Expand search)
decrease human » increase human (Expand search), disease human (Expand search), decrease asian (Expand search)
eletron python » eletron proton (Expand search), eletron pion (Expand search), eletron positron (Expand search)
decrease cell » decreases cell (Expand search), decrease il (Expand search), decrease fear (Expand search)
cell decrease » cells decrease (Expand search), cells decreases (Expand search), will decrease (Expand search)
human program » woman program (Expand search), humor program (Expand search), humanas programa (Expand search)

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

• Removing quotes may allow a broader search: (( decrease cell decrease human program ) OR ( vpython colisoes eletron python programming ))~.