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