Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ban cong ve snippets" » "bang cong ve snippets", "van cong ve snippets", "phan cong ve snippets", "ban cuong ve snippets", "ban cong va snippets", "ban long ve 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 cong ve 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 cong ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ban cong ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ban cong ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.