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\ )*.