Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham do ho snippets" » "pham doi ho snippets", "pham mo ho snippets", "pham o ho snippets", "pham do hoa snippets", "pham dao ho snippets", "pham do bo 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: (((("pham do ho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("pham do ho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham do ho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham do ho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.