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