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