Talvez deva tentar algumas variações de ortografia:
ladder programming » linear programming (Expandir a busca), and programming (Expandir a busca), based programming (Expandir a busca)
decrease ladder » decreased bladder (Expandir a busca), decrease after (Expandir a busca), decrease litter (Expandir a busca)
decrease fear » decrease after (Expandir a busca), decrease their (Expandir a busca), decrease cell (Expandir a busca)
fear decrease » break decrease (Expandir a busca), merr decreases (Expandir a busca), can decrease (Expandir a busca)
python and » python based (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( decrease fear decrease ladder programming ) OR ( python and with python programming ))~.