Hello,
I hadn't seen any recent results that approached this subject.
When using the TargetingIdeaService, ideaType KEYWORDS, requestType STATS, and searchParameter RelatedToQuerySearchParameter, an InternalApiError.UNEXPECTED_INTERNAL_API_ERROR is thrown consistently. The program follows the AdWords limits ( 
https://developers.google.com/adwords/api/docs/appendix/limits?hl=en ) with each keyword <= 80 characters (including xml escaped unicode) and no more than 800 keywords per request. It also waits at least 30 seconds between each request. It depends on v201509 AdWords API. This is for a test account.
The program had worked fine before with workable results, but lately this is the only result given.
Any help would be appreciated.