Hmm, it seems hit or miss.  Perhaps your sitelinks scoring algorithm is having too much of an impact here ?  Because it seems like several times a nearly full phrase will be ranked much lower than an incomplete or partial phrase.

For example Cart World Series is showing lower ranked in this query, where I expected it to be nearly 1st, given "cart+world":

http://wikidata-wdsearch.wmflabs.org/w/index.php?search=cart+world&title=Special:Search&profile=default&fulltext=1&searchToken=cnkg3v57431l8qwwwt8caqtj0

-Thad
+ThadGuidry