Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phap van cao snippets" » "pham van cao snippets", "phan van cao snippets", "phap han cao snippets", "phap van dao snippets", "phap van bao snippets", "phap van cau 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: (((("phap van cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phap van cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phap van cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phap van cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.