There are several synonyms that can be used instead of the phrase "poked into." Some examples include "probed," "investigated," "explored," "inspected," "delved into," "examined," "scrutinized," "perused," and "scanned." Each of these words implies a thorough inquiry or investigation into something. For instance, when you probe into a matter, you are trying to access deeper levels of information that are not easily accessible. Similarly, when you examine something, you are taking a closer look to analyze its details and intricacies. These synonyms can all be used interchangeably with "poked into" depending on the context of the sentence.