Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc van ion snippets" » "duc va ion snippets", "duc tan ion snippets", "duc manh ion snippets", "duc van bon snippets", "duc van don snippets", "duc van dong 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 van ion 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 van ion snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc van ion snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc van ion snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.