Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc phung da snippets" » "duc hung da snippets", "duc thang da snippets", "duc dung da snippets", "duc phung dang snippets", "duc phung van snippets", "duc phung duc 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 phung da 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 phung da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc phung da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc phung da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.