Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khuc hat le snippets" » "khac hau le snippets", "thuc ha le snippets", "khuc nhat le snippets", "khuc hat de snippets", "khuc hat ke 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: (((("khuc hat le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khuc hat le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khuc hat le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khuc hat le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.