Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi dieu cac snippets" » "thi lien cac snippets", "thi hien cac snippets", "vi dieu cac snippets", "thi dieu can snippets", "thi hieu cac snippets", "thi dien cac 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: (((("thi dieu cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thi dieu cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi dieu cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi dieu cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.