Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"hieu cac don snippets" » "hieu cac code snippets", "hieu luc don snippets", "hieu va don snippets", "hieu van don snippets", "hieu cac dan snippets", "hieu cac mon snippets", "hieu cac doanh snippets"
"python using java snippets" » "python using data 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 don snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hieu cac don snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( hieu cac don snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu cac don snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.