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