Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hang hau den snippets" » "hoang hau den snippets", "hang dau den snippets", "hang hai den snippets", "hang cau den snippets", "hang thau dien snippets", "hang thai den 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: (((("hang hau 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: (((("hang hau den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hang hau den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hang hau den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.