Perhaps you should try some spelling variations:
"tables logarithms" » "tables algorithms", "table algorithms", "all logarithms"
"trees algorithms" » "tree algorithms", "tree algorithm", "access algorithms"
"_ logarithms" » "_ logarithmic"

Try widening your search to All Fields.

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: (((("tables logarithms") OR ("trees algorithms"))) OR ("_ logarithms")).
• Removing quotes may allow a broader search: (((( tables logarithms ) or ( trees algorithms ))) or ( _ logarithms )).
• Adding a wildcard symbol may retrieve word variants: (((("tables logarithms") or ("trees algorithms"))) or ("_ logarithms"))*.