Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"anh vai cac snippets" » "anh va cac snippets", "anh bai cac snippets", "anh van cac snippets", "anh tai cac snippets", "anh voi cac 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: (((("anh vai cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("anh vai cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( anh vai cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("anh vai cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.