Ohcanbohtosat - (("Twenty-21st century Forecasting.") OR ("twenty-20th century forecasting."))
Ozuin - (("Twenty-21st century Forecasting.") OR ("twenty-20th century forecasting.")) - eai gávdnon bohtosat.
Gánnáha geahččalit iešguđetlágán čállinhámiid:
- "Twenty-21st century Forecasting." »
Geahččal viiddidit ohcama: Buot deaivamat.
Sáhtát oažžut lasi bohtosiid go hábmet iežat ohcama.
- Seđđon ohcamiin sáhttet gávdnot ohcanbohtosat, main leat seammasullasaš sánit: (("Twenty-21st century Forecasting.") OR ("twenty-20th century forecasting."))~.
- Sánit AND, OR ja NOT sáhttet moivet ohcama; geahččal lasihit aisttonmearkkaid ohcansániid birra: "((\"Twenty-21st century Forecasting.\") OR (\"twenty-20th century forecasting.\"))".
- Sáhtát oažžut eanet bohtosiid go sihkut aisttonmearkkaid: (( Twenty-21st century Forecasting. ) OR ( twenty-20th century forecasting. )).
- Joker-mearkkaid geavahemiin sáhtát gávdnat earálágán sátnehámiid: (("Twenty-21st century Forecasting.") OR ("twenty-20th century forecasting."))*.