“It might take some time, but I’m sure you’ll achieve/manage to find a better job.”

[dorax]

“It might take some time, but I’m sure you’ll achieve/manage to find a better job.”
Are the two word choices correct?

 

[Rover_KE]

No. Only 'manage' works in that sentence.

 

[dorax]

Is there any explanation why achieve isn't a good choice or it's just due to the context?

 

[GoesStation]

You achieve a state of being, like employment (though it would not be natural to say "achieve better employment").