The LH in the middle of a word is one of the trickiest pronunciations. Really though, it's not that hard. You just need to remember to half-pronounce the 'L'. So, it's not trabayar it's, trabaLHar. Feel yourself saying the L. But don't dwell on it. As soon as you feel the L continue right into the rest. You can treat the h pretty much as if it were a Y.
Let's hear it from a native shall we?