Perhaps you should try some spelling variations:
sentence complexity » sequence complexity (Expand search), science complexity (Expand search), sentence compression (Expand search)
modes sentence » des sentences (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
using python » usando python (Expand search), in python (Expand search)
using using » using fusing (Expand search), housing using (Expand search), nursing using (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: "(( modes sentence complexity control program ) OR ( using using python python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( modes sentence complexity control program ) OR ( using using python python programming ))*.