Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoi hieu du snippets" » "hoi phieu du snippets", "hoi tieu du snippets", "moi hieu du snippets", "hoi hien du snippets", "hoi hieu su snippets", "hoi 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: (((("hoi 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: (((("hoi hieu du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoi hieu du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoi hieu du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.