Perhaps you should try some spelling variations:
seri belajar » teori belajar, mari belajar, cara belajar
belajar anak » belajar dan
belajar diri » belajar dari, belajar di, belajar demi
studi sosial » studi sosio, studi siswa, segi sosial
anak sejak » anak sehat
diri studi » dini studi, siri studi, diri study

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( seri belajar anak sejak usia dini ) OR ( seri belajar diri studi sosial dan ))~.
• Adding a wildcard symbol may retrieve word variants: (( seri belajar anak sejak usia dini ) or ( seri belajar diri studi sosial dan ))*.