Perhaps you should try some spelling variations:
"dung rung code snippets" » "dung trung code snippets", "duong rung code snippets", "dung ung code snippets", "dung rung code slippers"
"van nga java snippets" » "van ngu java snippets", "van nga va snippets", "van nghe java snippets", "van ngoc java snippets", "van nhan java snippets", "van nga java 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: (((("dung rung code snippets") or ("van nga java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung rung code snippets") OR ("van nga java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung rung code snippets ) or ( van nga java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung rung code snippets") or ("van nga java snippets"))) or ("locating bug code snippets"))*.