leave no stone unturned Synonyms

make an extra effort try as hard as one can make an all-out effort make a great effort do everything possible do all one can do one's level best exert oneself work hard stay the course try one's best be determined try every possible course make all possible efforts make every possible effort make all efforts exert every effort not take no for an answer be pertinacious show determination be persistent spare no effort press ahead stand firm hold on hang on hang in press on plough on carry on go on persevere exhaust keep going keep on hammer away move heaven and earth knock oneself out go all out give one's all seek out pull out all the stops cast about plug away continue