Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham su hoat snippets" » "pham tu hoat snippets", "pham vu hoat snippets", "phap su hoat snippets", "pham su hoan snippets", "pham su hoa 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 su hoat 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 su hoat snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham su hoat snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham su hoat snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.