Perhaps you should try some spelling variations:
sentence complexity » sequence complexity (Expand search), science complexity (Expand search), sentence compression (Expand search)
control problems » control program (Expand search)
tracking python » teaching python (Expand search), tracking method (Expand search), tracking position (Expand search)
coder sentence » order sentences (Expand search), inter sentence (Expand search), compara sentence (Expand search)
using tracking » using stacking (Expand search), using ranking (Expand search), using brackish (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)

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

• Removing quotes may allow a broader search: (( coder sentence complexity control problems ) OR ( using tracking python python programming ))~.