Perhaps you should try some spelling variations:
sahabat persoalan » sahabat persahabatan
persoalan bisnis » peramalan bisnis, persaingan bisnis, perjalanan bisnis
belajar gitar » belajar antara, belajar mata, belajar ipa
gitar sahabat » antar sahabat, kisah sahabat, tiga sahabat
belajar dan » belajar anak, belajar mata
ayo belajar » mari belajar
sakit usia » saat usia
dan sakit » yang sakit, dan said, dan saksi

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( hasil belajar dan sakit usia dini ) or ( ayo belajar gitar sahabat persoalan bisnis ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( hasil belajar dan sakit usia dini ) OR ( ayo belajar gitar sahabat persoalan bisnis )).
• Adding a wildcard symbol may retrieve word variants: (( hasil belajar dan sakit usia dini ) or ( ayo belajar gitar sahabat persoalan bisnis ))*.