Perhaps you should try some spelling variations:
terhadap teman » terhadap tanah
sejumlah studi » sekolah studi, sebuah studi, sejarah studi
ayah terhadap » anak terhadap, arab terhadap, agama terhadap
dan daya » dan gaya, dan kaya, dan budaya
3 data » 1 data
a data » 1 data, a date, dan data

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: (( hati ((3 data) OR (a data)) dan daya alam ) OR ( ayah terhadap teman sejumlah studi di ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( hati ((3 data) OR (a data)) dan daya alam ) or ( ayah terhadap teman sejumlah studi di ))~".
• Adding a wildcard symbol may retrieve word variants: (( hati ((3 data) OR (a data)) dan daya alam ) or ( ayah terhadap teman sejumlah studi di ))*.