Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc hieu ve snippets" » "doc hieu ve snippets", "duc hien ve snippets", "thuc hieu ve snippets", "duc hieu va snippets", "duc hieu van 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: (((("duc hieu ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc hieu ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc hieu ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc hieu ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.