"fruitful paths" is correct and usable in written English.
You can use it to refer to paths or courses of action that lead to success or a positive outcome. For example: "We followed our own fruitful paths and eventually arrived at success."
In a paper published in 1958 in the IBM Journal of Research and Development, they wrote: "In a fundamental sense, proving theorems [in symbolic logic] and playing chess involve the same problem: reasoning with heuristics that select fruitful paths of exploration in a space of possibilities that grows exponentially.
See what isn't being done--that's often where the fruitful paths lie.
Empirical observations regarding stability are clearly limited: however, when dealing with comparatively slow reactions that can be documented visually in works of art, they offer insight into anticipating incipient change, and help focus experimental research onto fruitful paths along which interesting chemical processes that are associated with ongoing color change in art can be investigated.
His former headteacher described him as "a bright young man and a talented artist, with real potential to forge a worthwhile and fruitful path in his life".
But assume for the moment that Mr. Romney's campaign has decided that Pennsylvania is not a fruitful path to electoral victory.
The events of the evening -- the choking incident actually happened -- end in disaster, but not before Ave Maria sets her sights on a more fruitful path.
A more fruitful path forward, he suggests, is to consider the universe as a single enormous system, and to build a new kind of theory that can apply to the whole thing.
It's a fruitful path and it certainly needs to be pursued with vigour".
Once innovation is set on a fruitful path, it tends to accelerate on its own.
The latter mode seems like the more fruitful path, but there's no real consistency of tone or direction; it's hard to decide if the show's pretension or confusion is more frustrating.
Although we have identified these proteases in virgin females, these differentially expressed serine proteases present in the ECB female reproductive tract will provide a fruitful path for future study of post-copulatory interactions and post-mating, pre-zygotic barriers.
