Perhaps you should try some spelling variations:
"nijhoff book titles 2.9" » "nijhoff boston titles 2.9", "nijhoff book entitled 2.9", "nijhoff book intitled 2.9", "nijhoff book titles 19", "nijhoff book titles 3.1", "nijhoff book titles 3.2"
"nijhoff ebook title 2006" » "nijhoff book title 2006", "nijhoff ebook title 20", "nijhoff ebook title 2012"
"nijhoff ework title 2006" » "nijhoff works title 2006", "nijhoff networks title 2006", "nijhoff ework title 20", "nijhoff ework title 2012", "nijhoff ework time 2006", "nijhoff ework entitled 2006", "nijhoff ework intitled 2006"
"nijhoff work titles 26" » "nijhoff works titles 26", "nijhoff works title 26", "nijhoff working titles 26", "nijhoff work times 26", "nijhoff work entitleds 26", "nijhoff work intitleds 26", "nijhoff work titles _", "nijhoff work titles 1", "nijhoff work titles ii"
"nijhoff op titles 26" » "nijhoff _ titles 26", "nijhoff j titles 26", "nijhoff up titles 26", "nijhoff comp titles 26", "nijhoff job titles 26", "nijhoff op titles _", "nijhoff op titles 1", "nijhoff op titles ii"
"nijhoff work title 26" » "nijhoff work time 26", "nijhoff work entitled 26", "nijhoff work intitled 26", "nijhoff work title 2", "nijhoff work title 21", "nijhoff work title 25"

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: (((("nijhoff ebook title 2006") OR ("nijhoff ework title 2006"))) OR ((((((("nijhoff book titles 2.9") OR ("nijhoff op titles 26"))) OR ("nijhoff work titles 26"))) OR ("nijhoff work title 26"))))*.
• Removing quotes may allow a broader search: (((( nijhoff ebook title 2006 ) or ( nijhoff ework title 2006 ))) or ((((((( nijhoff book titles 2.9 ) or ( nijhoff op titles 26 ))) or ( nijhoff work titles 26 ))) or ( nijhoff work title 26 ))))*.