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