Search for tenders that have specific words or phrases in the advertisement.
OR = , (comma)
eg. for "water OR pipe" type "water,pipe"
AND = * (asterix)
eg. for "fire AND alarm" type "fire*alarm"
NOT = # (hash)
eg. for "fire AND NOT wall" type "fire*#wall"
Cut off the ends of words to find alternatives: analys = analyse or analysing
Use an empty space to prevent unwanted results: "gis" = register while " gis " = GIS