Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ban hoang de snippets" » "ban hang de snippets", "van hoang de snippets", "quan hoang de snippets", "ban hoang _ 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: (((("ban hoang de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ban hoang de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ban hoang de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ban hoang de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.