| smell out(verb, expression, cover, determine, do) |
| hunt down(verb, expression, determine, follow, catch) |
| ferret out(verb, expression, cover, do, follow) |
| trace(verb, cover, determine, do, follow) |
| track down(verb, expression, determine, follow, catch) |
| follow(verb, cover, determine, catch, discover) |
| nose out |
| trail(verb, cover, determine, follow, catch) |
| be on to(verb, determine, follow, discover, pursue) |
| beat the bushes(expression, idiom, cover, do, follow) |
| bird-dog(verb, cover, do, follow, catch) |
| chase(verb, cover, determine, follow, catch) |
| chase down(verb, expression, determine, follow, discover) |
| dig out(verb, expression, determine, follow, discover) |
| drive out(verb, expression, determine, follow, discover) |
| get at(verb, expression, determine, follow, discover) |
| go after(verb, expression, cover, follow, catch) |
| hunt(verb, cover, determine, follow, catch) |
| nose(verb, follow, pursue, investigate, scratch) |
| penetrate(verb, determine, follow, discover, pursue) |