It kind of depends on what kind of obedience you are looking for from your dog as well- 100% reliable and precise you probably won't get no matter how hard you try. It's just not the basset way.
A book called "So Your Dog is Not Lassie" may help out. Some of the trick training books I've encountered have helped me trouble shoot with my shibas. For my two stubborn beasts, we need to keep training light, fun, highly rewarding, not too many repetitions and play to strengths and not weaknesses. The goals have to be crystal clear and sometimes my timing stinks and I get a result that is creative, but not exactly what I wanted. I have to typically end a session then and move on at a later date. Clickers are the way to go with my two, but I have to break behviors down into some of the most minor of details and not cluster things at all. We sometimes add duration seconds at a time. Even then, I'll sometimes get an odd response captured along with what I thought I was getting- to this day my younger dog's fastest down is proceeded by a sneeze because of a strangely timed click on my part. I've tried removing the sneeze from the equation only to get frustration- it's like the fast down was too eazy and must have something more to it.
Hang in there for trianing. It can be frustrating at times, but sometimes that's the perios right before big breakthroughs are going to happen.
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Chelle and the rest of the crew including, but not limited to Kita and Taiko (the shiba inu wrestle maniacs), Adi (reserved and dignified tabby cat), and all 28 reptiles