не увидев, ни своего отца, ни мальч

не увидев, ни своего отца, ни мальчика, она подумала, что они, быть может, переставляют книги на полках.

Результаты (английский) 1:

not seeing any of their father or a boy, she thought that they might, rearranging the books on the shelves.

Результаты (английский) 2:

not seeing, nor his father, nor the boy, she thought they were perhaps rearrange the books on the shelves.

Результаты (английский) 3:

Not him, nor his father, neither boy, she thought, that they may be, are relocated books on the shelves.