Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoi qua cua snippets" » "hoi qua cua snippets", "khoi cua cua snippets", "khai quat cua snippets", "khoi quan cua snippets", "khoi quang cua snippets", "khoi qua quan 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 qua cua 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 qua cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoi qua cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoi qua cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.