Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hieu sau do snippets" » "hieu su do snippets", "hieu suat do snippets", "tieu su do snippets", "hieu cau do snippets", "hieu sau de snippets", "hieu dau do 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: (((("hieu sau do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hieu sau do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hieu sau do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu sau do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.