Perhaps you should try some spelling variations:
table back » tables back, table backup, table brock
table bay » table b, table 1a, table bgp
table 2a » table 27, table 2.1, table 2.2
table 21 » table 2.1, table 1, table 11
table 2 » table 1

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: ((((table bay) OR (table back))) OR (((table 2a) OR (((table 21) OR (table 2)))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((table bay) OR (table back))) or (((table 2a) or (((table 21) or (table 2))))))".
• Adding a wildcard symbol may retrieve word variants: ((((table bay) OR (table back))) or (((table 2a) or (((table 21) or (table 2))))))*.