Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hieu le so snippets" » "hieu ve so snippets", "hieu he so snippets", "hieu ly so snippets", "hieu le co snippets", "hieu li so 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 le so 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 le so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hieu le so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu le so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.