BEIJING — Since Malaysia Airlines Flight 370 went missing, some lawyers have claimed they can get several millions of dollars in damages for each lost passenger by taking the cases to the United States. But past lawsuits show U.S. federal courts are more likely to throw out such cases if the crashes happened overseas. Major disasters draw lawyers looking to sign up clients for big lawsuits, and the missing Malaysian plane, which was carrying mostly Chinese passengers, has been no exception. Lawyers from various …