Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc ban tre snippets" » "duc tan tre snippets", "duc van tre snippets", "dua ban tre snippets", "duc ben tre snippets", "duc ban tro snippets", "duc benh tre 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 ban tre 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 ban tre snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc ban tre snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc ban tre snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.