Perhaps you should try some spelling variations:
"danh viet ta snippets" » "anh viet ta snippets", "ninh viet ta snippets", "nang viet ta snippets", "danh viet tay snippets", "danh viet ha snippets", "danh viet tu snippets", "danh viet ta slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("danh viet ta snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("danh viet ta snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh viet ta snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh viet ta snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.