Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dung cuong do snippets" » "dung cuong code snippets", "dung cong do snippets", "dang cuong do snippets", "dung huong do snippets", "dung cuong dao snippets", "dung cuong vo snippets", "dung luong do 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: (((("dung cuong do snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung cuong do snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung cuong do snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung cuong do snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.