Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoi uu cho snippets" » "khoi su cho snippets", "khoi cua cho snippets", "khoi dau cho snippets", "khoi cu cho snippets", "khoi vu cho snippets", "khoi zu 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: (((("khoi uu 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: (((("khoi uu cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoi uu cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoi uu cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.