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