Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"con trong de snippets" » "cong trong de snippets", "chon trong de snippets", "con truong de snippets", "con trong den snippets", "con trong le snippets", "con trong he 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: (((("con trong 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: (((("con trong de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( con trong de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("con trong de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.