Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khu cong de snippets" » "thu cong de snippets", "thi cong de snippets", "cuu cong de snippets", "khu cong da snippets", "khu cong ve snippets", "khu 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: (((("khu 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: (((("khu cong de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khu cong de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khu cong de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.