Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham xuan ho snippets" » "pham luan ho snippets", "pham quang ho snippets", "pham van ho snippets", "pham xuan ha snippets", "pham xuan huy snippets", "pham xuan thu 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 xuan 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 xuan ho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham xuan ho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham xuan ho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.