The search engines at the time were unable to do good full text searching. This issue can be seen in the “Pareto of barriers to knowledge work” figure.

Respondents
cumulative percent of respondents
unrealistic timeframes
lack of knowledge
missing parties
lack of technical documents
lack of internal consultants
don’t share knowledge
wrng parties
lack of planning
divergent values
over structured forums
don’t use knowledge
lack of external consultants
diffuse responsibilities
unclear procedures
under structured forums