Perhaps you should try some spelling variations:
"cong viet ta snippets" » "cong viec ta snippets", "thong viet ta snippets", "nang viet ta snippets", "cong viet tay snippets", "cong viet ha snippets", "cong viet tu snippets", "cong 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: (((("cong 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: (((("cong viet ta snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong viet ta snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong viet ta snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.