Perhaps you should try some spelling variations:
"best de wilcoxon- mann OR mano -whitney" » "benet de wilcoxon- mann OR mano -whitney" (Expand Search), "besan de wilcoxon- mann OR mano -whitney" (Expand Search), "test del wilcoxon- mann OR mano -whitney" (Expand Search)
"test de wilcoxon- mann OR mano -whitney" » "text de wilcoxon- mann OR mano -whitney" (Expand Search), "est de wilcoxon- mann OR mano -whitney" (Expand Search)

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("test de wilcoxon-(mann OR mano)-whitney") OR ("best de wilcoxon-(mann OR mano)-whitney"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"test de wilcoxon-(mann OR mano)-whitney\") OR (\"best de wilcoxon-(mann OR mano)-whitney\"))".
• Removing quotes may allow a broader search: (( test de wilcoxon-(mann OR mano)-whitney ) OR ( best de wilcoxon-(mann OR mano)-whitney )).
• Adding a wildcard symbol may retrieve word variants: (("test de wilcoxon-(mann OR mano)-whitney") OR ("best de wilcoxon-(mann OR mano)-whitney"))*.