Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hieu cac me snippets" » "hieu luc me snippets", "hieu va me snippets", "hieu van me snippets", "hieu cac he snippets", "hieu cac ke snippets", "hieu cac le 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: (((("hieu cac me snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hieu cac me snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hieu cac me snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu cac me snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.