Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hieu tuc de snippets" » "hieu thuc de snippets", "hieu luc de snippets", "hieu thuoc de snippets", "hieu tuc le snippets", "hieu tac de snippets", "hieu tuc di 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 tuc de 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 tuc de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hieu tuc de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu tuc de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.