Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dap du hoc snippets" » "lap du hoc snippets", "day du hoc snippets", "dao du hoc snippets", "dap tu hoc snippets", "dap duoc hoc 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 du hoc 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 du hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dap du hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dap du hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.