Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoi moi he snippets" » "khoe moi he snippets", "khi moi he snippets", "khoi noi he snippets", "khoi moi ve snippets", "khoi moi ke snippets", "khoi moi de 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 moi he 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 moi he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoi moi he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoi moi he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.