Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hang ke moi snippets" » "thong ke moi snippets", "hanh kem moi snippets", "nhung ke moi snippets", "hang ve moi snippets", "hang ke mo snippets", "hang te moi 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: (((("hang ke moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hang ke moi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hang ke moi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hang ke moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.