Perhaps you should try some spelling variations:
permasalahan tantangan » permasalahan pangan, permasalahan lingkungan, permainan tantangan
tantangan masa » tantangan dan
mari belajar » hasil belajar
belajar baca » belajar mata, belajar membaca, belajar bahasa
masa usaha » kuasa usaha, tata usaha, lama usaha
usaha dini » usia dini, usaha tani, usaha dan
dunia 1 » dunia 4

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: (( mari belajar baca di dunia 1 ) OR ( 1 permasalahan tantangan masa usaha dini ))~.
• Adding a wildcard symbol may retrieve word variants: (( mari belajar baca di dunia 1 ) or ( 1 permasalahan tantangan masa usaha dini ))*.