Talvez deva tentar algumas variações de ortografia:
perl programming » cell programming (Expandir a busca), period programming (Expandir a busca), fetal programming (Expandir a busca)
coder learning » codes learning (Expandir a busca), modern learning (Expandir a busca), model learning (Expandir a busca)
learning perl » learning pbl (Expandir a busca), learning peer (Expandir a busca), learning pjbl (Expandir a busca)
python python » pythons python (Expandir a busca), piton python (Expandir a busca), pitons python (Expandir a busca)
coder coder » coder decoder (Expandir a busca), code code (Expandir a busca), decoder codec (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( coder coder learning perl programming ) OR ( _ python python python programming ))~.