Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"o hao zhang snippets" » "o tao zhang snippets", "o xiao zhang snippets", "o bao thang snippets", "_ hao zhang snippets", "o lao zhang snippets", "o cao zhang snippets", "o hao 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: "((((\"o hao zhang snippets\") OR (\"python using java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( o hao zhang snippets ) OR ( python using java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("o hao zhang snippets") OR ("python using java snippets"))) OR ("locating bug code snippets"))*.