+/** \brief returns information about a term assocated with a result set
+ \param zh session handle
+ \param setname result set name
+ \param no the term we want to know about (0=first, 1=second,..)
+ \param count the number of occurrences of this term, aka hits (output)
+ \param approx about hits: 0=exact,1=approx (output)
+ \param termbuf buffer for term string (intput, output)
+ \param termlen size of termbuf (input=max, output=actual length)
+ \param term_ref_id if non-NULL *term_ref_id holds term reference
+
+ Returns information about one search term associated with result set.
+ Use zebra_result_set_term_no to read total number of terms associated
+ with result set. If this function can not return information,
+ due to no out of range or bad result set name, ZEBRA_FAIL is
+ returned.
+ The passed termbuf must be able to hold at least *termlen characters.
+ Upon completion, *termlen holds actual length of search term.
+*/