http://172.19.1.196:8983/solr/secweb/select?q=definite tough OR "definite tough" OR "certain difficult" OR "certain challenging" OR "definite difficult" OR "definite challenging"&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&fq=key_filetype%3Adoc&start=0&rows=10
means short-term investments with high liquidity ready to be converted into definite amounts of cash, and low risk of value changing or pertaining insignificant value changing, most of which are bills or