YOU SAID:

I went to the store to get donuts

INTO JAPANESE

私はドーナツをもらうために店に行きました

BACK INTO ENGLISH

I went to the store to get a donut

INTO JAPANESE

ドーナツを買いに店に行きました

BACK INTO ENGLISH

I went to the shop to buy donuts

INTO JAPANESE

ドーナツを買いに店に行きました

BACK INTO ENGLISH

I went to the shop to buy donuts