Perhaps you should try some spelling variations:
"dung viet code snippets" » "nang viet code snippets", "cong viet code snippets", "mang viet code snippets", "dung viet co snippets", "dung viet some snippets", "dung viet code slippers"
"cong lbm code snippets" » "cong kim code snippets", "cong nam code snippets", "cong lap code snippets", "cong lbm code slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code 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 lbm code snippets") or ("dung viet code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong lbm code snippets") OR ("dung viet code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong lbm code snippets ) or ( dung viet code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong lbm code snippets") or ("dung viet code snippets"))) or ("locating bug code snippets"))*.