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