Perhaps you should try some spelling variations:
quantitative estimation » quantitative evaluation, quantitative description, quantitative detection
quality estimation » density estimation, quality evaluation
quality education » quality evaluation

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: sideslip ((((quality estimation) OR (quality education))) OR (quantitative estimation)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "sideslip ((((quality estimation) OR (quality education))) or (quantitative estimation))".
• Adding a wildcard symbol may retrieve word variants: sideslip ((((quality estimation) OR (quality education))) or (quantitative estimation))*.