Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hieu pham do snippets" » "hieu phap do snippets", "sieu pham do snippets", "chieu phim do snippets", "hieu pham doi snippets", "hieu pham mo snippets", "hieu pham o 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 pham 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 pham do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hieu pham do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu pham do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.