Perhaps you should try some spelling variations:
variable functions » covariance functions (Expand search), variation functions (Expand search), measurable functions (Expand search)
precoding coding » precoding using (Expand search), precoding combining (Expand search)
coder precoding » coherent precoding (Expand search), linear precoding (Expand search)
coding variable » cooking variables (Expand search), loading variables (Expand search), voiding variables (Expand search)
python python » pythons python (Expand search), piton python (Expand search), pitons python (Expand search)
api python » rpa python (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: "(( coder precoding coding variable functions ) OR ( api python python python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( coder precoding coding variable functions ) OR ( api python python python programming ))*.