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