Perhaps you should try some spelling variations:
sahabat dunia » sahabat dari, sahabat pena
seri belajar » teori belajar, mari belajar
cara belajar » mari belajar, dalam belajar, ayo belajar
belajar mata » belajar anak
mata sahabat » mitra sahabat, para sahabat, ala sahabat
bank dunia » dan dunia
dan bank » di bank, dan batu
dunia ii » dunia di, dunia 4, dunia 1

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 dan bank dunia edisi ) OR ( cara belajar mata sahabat dunia ii ))~.
• Adding a wildcard symbol may retrieve word variants: (( seri belajar dan bank dunia edisi ) or ( cara belajar mata sahabat dunia ii ))*.