Perhaps you should try some spelling variations:
vpython colisoes » vpython collisions (Expand search)
colisoes python » colisoes proton (Expand search), codigos python (Expand search), colisoes eletron (Expand search)
decrease model » increase model (Expand search), decrease sod (Expand search), decrease total (Expand search)
circ decrease » virus decrease (Expand search), can decrease (Expand search), or decrease (Expand search)
model program » modelo programa (Expand search), del programa (Expand search), meal program (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
code circ » code irc (Expand search), code cpc (Expand search), code cdc (Expand search)

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

• Removing quotes may allow a broader search: (( code circ decrease model program ) OR ( vpython colisoes python python programming ))~.