Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa can von snippets" » "khoa cam von snippets", "khoa cap von snippets", "khoi can von snippets", "khoa van von snippets", "khoa can van snippets", "khoa toan von 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: (((("khoa can von snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa can von snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa can von snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa can von snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.