This is makeindex, version 2.15 [TeX Live 2020/W32TeX] (kpathsea + Thai support).
Scanning input file thesis-english.idx....done (6 entries accepted, 0 rejected).
Sorting entries....done (19 comparisons).
Generating output file thesis-english.ind....done (17 lines written, 0 warnings).
Output written in thesis-english.ind.
Transcript written in thesis-english.ilg.