Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"c yan zhang snippets" » "c yang zhang snippets", "c ban hang snippets", "c van khang snippets", "c ban zhang snippets", "c can zhang snippets", "c van zhang snippets", "c yan zhang slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"c yan zhang snippets\") OR (\"python using java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( c yan zhang snippets ) OR ( python using java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("c yan zhang snippets") OR ("python using java snippets"))) OR ("locating bug code snippets"))*.