Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc phong so snippets" » "du phong so snippets", "duc phung so snippets", "duc hong so snippets", "duc phong mo snippets", "duc phong cho snippets", "duc cong so 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 so 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 so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc phong so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc phong so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.