Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"gian duy doc snippets" » "gian dua doc snippets", "gian quy doc snippets", "giang day doc snippets", "gian day doc snippets", "gian duy dac snippets", "gian duy dot snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

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