Ohcanbohtosat - "\"(environmental OR environment) (production\" OR introduction\")*"
Ozuin - "\"(environmental OR environment) (production\" OR introduction\")*" - eai gávdnon bohtosat.
Sáhtát oažžut lasi bohtosiid go hábmet iežat ohcama.
- Sánit AND, OR ja NOT sáhttet moivet ohcama; geahččal lasihit aisttonmearkkaid ohcansániid birra: "\"\\"(environmental OR environment) (production\\" OR introduction\\")*\"".
- Sáhtát oažžut eanet bohtosiid go sihkut aisttonmearkkaid: (environmental OR environment) (production OR introduction )*.