Perhaps you should try some spelling variations:
complex control » complete control (Expand search), complex central (Expand search), complexity control (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
tree complex » are complex (Expand search), large complex (Expand search), base complex (Expand search)
using python » usando python (Expand search), in python (Expand search)
using using » housing using (Expand search), aging using (Expand search), ring using (Expand search)
coded tree » bounded tree (Expand search), crooked tree (Expand search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( coded tree complex control program ) OR ( using using python python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( coded tree complex control program ) OR ( using using python python programming ))*.