Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham nam lon snippets" » "pham nhat lon snippets", "pham van lon snippets", "pham tai lon snippets", "pham nam lo snippets", "pham nam hon snippets", "pham nam son 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 nam lon 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 nam lon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham nam lon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham nam lon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.