Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chieu tro do snippets" » "chi tro do snippets", "chieu cao do snippets", "chieu gio do snippets", "chieu tro dao snippets", "chieu trao doi 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: (((("chieu tro do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chieu tro do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chieu tro do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chieu tro do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.