Ngā hua rapu - (("bibliography 20th century") OR ((("geography 20th century") OR ("biography 20th century"))))~
Kāore tō rapu - (("bibliography 20th century") OR ((("geography 20th century") OR ("biography 20th century"))))~ - i ōrite ki tētahi rauemi.
Ka taea pea ētahi hua anō mā te whakakē i tō uiui rapu.
- Kā taea pea e ngā kupu AND, OR me NOT tō rapu te whakapōraru; tāpiritia he tohukī: "((\"bibliography 20th century\") OR (((\"geography 20th century\") OR (\"biography 20th century\"))))~".
- Mā te tango tohukī e tukua ai pea he rapu whānui ake: (( bibliography 20th century ) OR ((( geography 20th century ) OR ( biography 20th century ))))~.
- Mā te tāpiri tohu kārimākā e tikia atu ai pea ngā rerekētanga ā-rohe: (("bibliography 20th century") OR ((("geography 20th century") OR ("biography 20th century"))))*.