Perhaps you should try some spelling variations:
era persaingan » era perdagangan, dan persaingan, era pertanian
sejarah barat » sejarah para, sejarah surat, sejarah banaten
persaingan di » persaingan dan, persalinan di, persaingan studi
bahasa akar » bahasa aksara, bahasa dasar, bahasa anak
budi di » budi dwi, studi di, budi tri
di dan » dai dan, bi dan, diri dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( hari ((bahasa akar) OR (bahasa arab)) sejarah barat dan ) or ( era persaingan di dan budi di ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( hari ((bahasa akar) OR (bahasa arab)) sejarah barat dan ) OR ( era persaingan di dan budi di ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( hari ((bahasa akar) OR (bahasa arab)) sejarah barat dan ) or ( era persaingan di dan budi di ))*".