Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"minh dan den snippets" » "minh danh den snippets", "minh doan den snippets", "binh dan den snippets", "minh ban den snippets", "minh van den snippets", "minh dan dung 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: (((("minh dan den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("minh dan den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( minh dan den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("minh dan den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.