Talvez deva tentar algumas variações de ortografia:
decrease observer » decrease observed (Expandir a busca), terrame observer (Expandir a busca)
observer program » server programa (Expandir a busca), observatory program (Expandir a busca), escrever program (Expandir a busca)
python xcode » python code (Expandir a busca), python cuda (Expandir a busca)
decrease by » decreased by (Expandir a busca), decrease in (Expandir a busca), decrease of (Expandir a busca)
by decrease » by decreased (Expandir a busca), may decrease (Expandir a busca), any decrease (Expandir a busca)
xcode java » codes java (Expandir a busca)

Você pode obter mais resultados ajustando o argumento de busca.

• Remover as aspas pode possibilitar buscas mais amplas: (( decrease by decrease observer program ) OR ( python xcode java python programming ))~.