Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khi cong tom snippets" » "thi cong tom snippets", "khu cong tom snippets", "phi cong tom snippets", "khi cong them snippets", "khi cong toan snippets", "khi cong ty 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: (((("khi cong tom snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khi cong tom snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khi cong tom snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khi cong tom snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.