Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"duong mat can snippets" » "duong mat code snippets", "duong ma can snippets", "luong mat can snippets", "duong manh can snippets", "duong bat can snippets", "duong mat dan snippets", "duong 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: (((("duong 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: (((("duong mat can snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( duong mat can snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong mat can snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.