большие заслуги — great services
вменять в заслугу — to regard as a merit
воздавать по заслугам — to reward according to his deserts
воздание по заслугам — come-back
за прошлые заслуги — for smb.'s past services
каждому по заслугам — to each according to his deserts
оценивать кого-л. по заслугам — to treat smb. according to his merits
преуменьшать свои заслуги — to make light of one's services
ставить в заслугу кому-л. — to give smb. the credit (of)
ставить себе в заслугу — to think highly of one's own actions
умалять чьи-л. заслуги — to belittle smb.'s services; to detract from smb.'s merit