Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhan hieu du snippets" » "nhan dieu du snippets", "phan hieu du snippets", "nha hieu du snippets", "nhan hien du snippets", "nhan hieu su snippets", "nhan hiem du 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: (((("nhan hieu du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhan hieu du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan hieu du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan hieu du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.