If you want reference based on anime manga for modelling, the key word to use in google images is : "settei" settei=modelsheet, example if you want search your favorite anime character like Naruto type this in google "settei naruto" or another example "settei one piece" and more accurate "settei one piece luffy"
In google you can replace the word settei by "model sheets", ex: "model sheets disney", "model sheets tex avery" and more accurate "model sheets disney hercule" etc... sometimes model sheets is writing like this "modelsheets".
And if you search vehicules reference the word is "blueprint" , ex: "blueprint ford" and more accurate "blueprint ford gt 40"
You must find the good keywords for a accurate search in google to don't waste time.
I share these tips because they are useful for beginners in 3d modelling like me
