Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"trong mat can snippets" » "trong mat code snippets", "trong mot can snippets", "trong dat can snippets", "trong mau can snippets", "trong bat can snippets", "trong mat dan snippets", "trong mao can snippets"
"dung java java snippets" » "dung va java 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: (((("trong mat can snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trong mat can snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( trong mat can snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trong mat can snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.