Ohcanbohtosat - (( (bibliography OR geography) 20th century ) OR ( biography 20th century ))~

Ozuin - (( (bibliography OR geography) 20th century ) OR ( biography 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 OR geography) 20th century ) OR ( biography 20th century ))~".
Joker-mearkkaid geavahemiin sáhtát gávdnat earálágán sátnehámiid: (( (bibliography OR geography) 20th century ) OR ( biography 20th century ))*.