Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc phuc se snippets" » "dum phuc se snippets", "duc phung se snippets", "duc suc se snippets", "duc phuc sen snippets", "duc phuc su snippets", "duc phuc le 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 phuc se 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 phuc se snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc phuc se snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc phuc se snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.