http://172.19.1.196:8983/solr/secweb/select?q=difficulty PTT Exploration and Production Public Company Limited (PTTEP) OR "difficulty PTTEP" OR "challenge PTT Exploration and Production Public Company Limited" OR "challenge PTTEP" OR "hardship PTT Exploration and Production Public Company Limited" OR "hardship PTTEP"&wt=json&indent=true&facet=true&facet.field=key_filetype&facet.field=key_sitemap&facet.field=system_name&facet.field=key_keywords&hl=on&hl.fragsize=200&hl.fl=id,title_th,searchcontent_th&defType=edismax&qf=searchcontent_th&qf=id&qf=title_th^1000000&pf=title_th~5^1&pf=searchcontent_th~5^10000&ps=2&mm=100&qf=title_th_default&start=150&rows=10

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