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