Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham san che snippets" » "pham van che snippets", "pha san che snippets", "pham lan che snippets", "pham sang che snippets", "pham han che snippets", "pham san chi 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 san che 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 san che snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham san che snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham san che snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.