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