Perhaps you should try some spelling variations:
"graphical charts / technique" » "graphical reports / technique", "graphic arts / technique", "nautical charts / technique"
"graphical chain / technique" » "graphical design / technique"
"graphical arts / technique" » "graphic arts / technique", "graphical aids / technique", "graphical part / technique"

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: (((("graphical arts / technique") OR ("graphical chain / technique"))) OR ("graphical charts / technique")).
• Removing quotes may allow a broader search: (((( graphical arts / technique ) or ( graphical chain / technique ))) or ( graphical charts / technique )).
• Adding a wildcard symbol may retrieve word variants: (((("graphical arts / technique") or ("graphical chain / technique"))) or ("graphical charts / technique"))*.