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