| Dig |
| Probe |
| Search |
| Burrow |
| Ferret |
| Rummage |
| Dig into |
| Research |
| Go (into) |
| Scrutinize |
| Look into? |
| Dig deeply? |
| Investigate |
| Search into |
| Do research |
| Go deep into |
| Probe deeply |
| Inquire into |
| Dig for data |
| Probe (into) |
| Look closely |
| Seek to learn |
| Search deeply |
| Plunge (into) |
| Explore deeply |
| Dig into files |
| Dig — rummage |
| Search for data |
| Research deeply |
| Search carefully |
| Go deeply (into) |
| Look into deeply |
| Seek laboriously |
| Do research work |
| Turn up — dig |
| Dig deeply (into) |
| Probe, with "into |
| Research intensely |
| Search, with "into |
| ____ into (examine) |
| Dig — investigate |
| Search deeply (into) |
| Dig deeply with into |
| Do intensive research |
| Investigate intensely |
| Go deeper into matters |
| Search for information |
| Dig, as for information |
| Do painstaking research |
| Conduct an exhaustive probe |
| Examine closely, with "into |
| Investigate (with ''into'') |
| Search deeply (with "into") |
| Examine carefully, with "into |
| Investigate deeply (with ''into'') |
| ___ into (do a probing investigation of) |
| Make painstaking enquiries (into something) |