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