Ohcanbohtosat - (( ((bibliography 20th) OR (biography 20th)) century ) OR ( geography 20th century ))~
Ozuin - (( ((bibliography 20th) OR (biography 20th)) century ) OR ( geography 20th century ))~ - eai gávdnon bohtosat.
Sáhtát oažžut lasi bohtosiid go hábmet iežat ohcama.
- Sánit AND, OR ja NOT sáhttet moivet ohcama; geahččal lasihit aisttonmearkkaid ohcansániid birra: "(( ((bibliography 20th) OR (biography 20th)) century ) OR ( geography 20th century ))~".
- Joker-mearkkaid geavahemiin sáhtát gávdnat earálágán sátnehámiid: (( ((bibliography 20th) OR (biography 20th)) century ) OR ( geography 20th century ))*.