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