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