Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"toc luong du snippets" » "toc muong du snippets", "hoc luong du snippets", "quoc luong du snippets", "toc luong duc snippets", "toc luong duy snippets", "toc luong tu 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: (((("toc luong du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("toc luong du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( toc luong du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toc luong du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.