B'fhéidir gur cheart duit triail a bhaint as roinnt athruithe sa litriú:
levels rather » level rather (Fairsingigh an Cuardach), cells rather (Fairsingigh an Cuardach)
level theory » model theory (Fairsingigh an Cuardach), cell theory (Fairsingigh an Cuardach)
doses devel » dose level (Fairsingigh an Cuardach), doses seven (Fairsingigh an Cuardach), doses derived (Fairsingigh an Cuardach)
diet levels » dust levels (Fairsingigh an Cuardach), met levels (Fairsingigh an Cuardach), pet levels (Fairsingigh an Cuardach)
drug doses » drug dose (Fairsingigh an Cuardach)
devel ther » novel ther (Fairsingigh an Cuardach), develop them (Fairsingigh an Cuardach)
drugs diet » drugs direct (Fairsingigh an Cuardach), drugs does (Fairsingigh an Cuardach), drugs differ (Fairsingigh an Cuardach)
diet level » direct level (Fairsingigh an Cuardach), set level (Fairsingigh an Cuardach), diet liver (Fairsingigh an Cuardach)
drug diet » drug direct (Fairsingigh an Cuardach), drug de (Fairsingigh an Cuardach), drug dietary (Fairsingigh an Cuardach)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

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• Performing a fuzzy search may retrieve terms with similar spellings: (( drug doses devel ther ) or ((( drug diet levels rather ) or ( drugs diet level theory ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( drug doses devel ther ) OR ((( drug diet levels rather ) OR ( drugs diet level theory )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( drug doses devel ther ) or ((( drug diet levels rather ) or ( drugs diet level theory ))))*.