Perhaps you should try some spelling variations:
extraction sequential » extracao sequencial (Expand search), extraction potential (Expand search), extraccao sequencial (Expand search)
sequential method » sequential motor (Expand search), sequencing methods (Expand search), potential method (Expand search)
coder extraction » code extraction (Expand search), copper extraction (Expand search), powder extraction (Expand search)
method problems » method process (Expand search)
boosting method » costing method (Expand search), costing methods (Expand search), casting method (Expand search)
using boosting » using rotating (Expand search), using boosted (Expand search), using resting (Expand search)
method python » method method (Expand search), python 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 extraction sequential method problems ) OR ( using boosting method python programming ))~".
• Adding a wildcard symbol may retrieve word variants: (( coder extraction sequential method problems ) OR ( using boosting method python programming ))*.