Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hieu cac voi snippets" » "hieu luc voi snippets", "hieu va voi snippets", "hieu van voi snippets", "hieu cac toi snippets", "hieu cac vi snippets", "hieu cac 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: (((("hieu cac voi 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 voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hieu cac voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu cac voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.