Perhaps you should try some spelling variations:
declarative programming » reactive programming (Expand search)
usando declarative » and declarative (Expand search), usando generative (Expand search)
python usando » python and (Expand search), python django (Expand search), python estudo (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.

• Removing quotes may allow a broader search: (( codigo python usando declarative programming ) OR ( using using python python programming ))~.