Ngā hua rapu - (( drugs: educacion, prevention AND policy* ) OR ( drugs: reduccion, prevention AND policy* ))~
Kāore tō rapu - (( drugs: educacion, prevention AND policy* ) OR ( drugs: reduccion, prevention AND policy* ))~ - i ōrite ki tētahi rauemi.
Me whakamātau pea he takikupu rerekē:
- prevention »
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: "(( drugs: educacion, prevention AND policy* ) OR ( drugs: reduccion, prevention AND policy* ))~".
- Mā te tāpiri tohu kārimākā e tikia atu ai pea ngā rerekētanga ā-rohe: (( drugs: educacion, prevention AND policy* ) OR ( drugs: reduccion, prevention AND policy* ))*.