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