Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"_ wei zhang snippets" » "_ web zhang snippets", "_ we zhang snippets", "_ wet zhang snippets", "_ wei zhang slippers", "_ wei hang snippets", "_ wei thang snippets", "_ wei khang snippets"
"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: "((((\"python using java snippets\") OR (\"_ wei zhang snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( python using java snippets ) OR ( _ wei zhang snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") OR ("_ wei zhang snippets"))) OR ("locating bug code snippets"))*.