Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets", "locating bugs code slippers"
"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"

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: (((("o hao zhang snippets") or ("python using java snippets"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("o hao zhang snippets") OR ("python using java snippets"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( o hao zhang snippets ) or ( python using java snippets ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("o hao zhang snippets") or ("python using java snippets"))) or ("locating bugs code snippets"))*.