Grab is used after these nouns:
land

suddenly
quickly

try to
manage to
He managed to grab a couple of hours' sleep.

at
I grabbed at his arm as he ran past.

by
As he walked past the boys, one of them grabbed him by the arm.

from
Somebody tried to grab her handbag from her.

grab hold of sth
He grabbed hold of a handrail to save himself from falling.

Grab is used with these nouns as the subject:
hand

Grab is used with these nouns as the object:
arm, attention, backpack, bag, ball, beer, belongings, bite, blanket, broom, cellphone, chair, chance, coat, control, drink, edge, end, hand, headline, hold, imagination, jacket, limelight, lunch, pen, pencil, phone, purse, rail, receiver, rein, rifle, rope, sandwich, seat, shower, slice, snack, soda, spotlight, suitcase, taxi, toy, wheel