Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dap thuat so snippets" » "va thuat so snippets", "dap luat so snippets", "cac thuat so snippets", "dap thuat do snippets", "dap thuat o snippets", "dap thuat co 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 thuat so 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 thuat so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dap thuat so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dap thuat so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.