Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dap cua moi snippets" » "dai cua moi snippets", "day cua moi snippets", "tap cua moi snippets", "dap cua mot snippets", "dap cua hoi 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 cua moi 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 cua moi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dap cua moi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dap cua moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.