"Hasil Pengeluaran Hk Siang" and "Data Keluaran Hk Siang 2021" refer to results and data for the Hong Kong afternoon lottery , a popular topic for gambling and prediction sites.
Based on the title and keywords you provided, this does not appear to be a formal academic or scientific paper. Instead, it seems to be an or a "scraper" site entry that has bundled together unrelated trending search terms from 2015 and 2021. The text is a mix of several distinct and unrelated topics: "Hasil Pengeluaran Hk Siang" and "Data Keluaran Hk
"Jabatan Pengairan Dan Saliran Negeri Sembilan" refers to the Department of Irrigation and Drainage in the state of Negeri Sembilan. The text is a mix of several distinct
"Pengajian Malaysia 2015" (Malaysian Studies) is a common general education subject in Malaysian higher education. "Hasil Pengeluaran Hk Siang" and "Data Keluaran Hk
"Gambar Menteri Besar Selangor Yang Baru" refers to images of the Menteri Besar (Chief Minister) of Selangor , likely referring to a leadership transition in that Malaysian state.