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