Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khi cong dot snippets" » "thi cong dot snippets", "khu cong dot snippets", "phi cong dot snippets", "khi cong mot snippets", "khi cong dong snippets", "khi cong doan 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 dot 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 dot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khi cong dot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khi cong dot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.