Talvez deva tentar algumas variações de ortografia:
insights learned » insights gleaned (Expandir a Pesquisa), insights gained (Expandir a Pesquisa), insights lead (Expandir a Pesquisa)
heart insights » health insights (Expandir a Pesquisa), early insights (Expandir a Pesquisa)
clear reward » learn reward (Expandir a Pesquisa), cleary edward (Expandir a Pesquisa), colour reward (Expandir a Pesquisa)
learned note » learned non (Expandir a Pesquisa), learned nicole (Expandir a Pesquisa), learned nonuse (Expandir a Pesquisa)
soft throat » sort throat (Expandir a Pesquisa), sore throat (Expandir a Pesquisa), slit throat (Expandir a Pesquisa)
note throat » nose throat (Expandir a Pesquisa), sore throat (Expandir a Pesquisa), pore throat (Expandir a Pesquisa)
early soft » early south (Expandir a Pesquisa), early scott (Expandir a Pesquisa), early salt (Expandir a Pesquisa)
have heart » have health (Expandir a Pesquisa), have learnt (Expandir a Pesquisa), care heart (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( clear reward insights early soft throat ) OR ( have heart insights learned note throat ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( clear reward insights early soft throat ) OR ( have heart insights learned note throat ))*.