Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lua van cong snippets" » "lua van dong snippets", "lua van phong snippets", "lua phan cong snippets", "luan van cong snippets", "luu van cong snippets", "qua 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: (((("lua 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: (((("lua van cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lua van cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lua van cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.