Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc phong he snippets" » "du phong he snippets", "duc phung he snippets", "duc hong he snippets", "duc khong he snippets", "duc phong le snippets", "duc phong ho 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: (((("duc phong he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc phong he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc phong he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc phong he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.