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