We can Directly search from LinkedIn home page  with the boolean strings available rather going for LinkedIn X-ray or Google X-ray Search.

You can write the basic command as ” Technology” that you look for and  “Looking for job” or “Immediate opportunities” and you being a non premium member you always have the leverage to filter, narrow the search and get the accurate results

One way is you could have your fellow mates tagged to your post / an opportunity which would eventually fetch you more results , because you will have more members viewed by followers or connections of your fellow mates where you may not have connected or interacted with. Start a poll and ask your network to tag other people to the post. Try and reply to the every comment on your post.

Hope this helps