Perhaps you should try some spelling variations:
"dung tnhanh code snippets" » "dung thanh code snippets", "dung nhan code snippets", "dung thang code snippets", "dung tnhanh code slippers"
"van hung code snippets" » "van dung code snippets", "manh hung code snippets", "van duong code snippets", "van hung 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: (((("van hung code snippets") or ("dung tnhanh code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van hung code snippets") OR ("dung tnhanh code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van hung code snippets ) or ( dung tnhanh code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van hung code snippets") or ("dung tnhanh code snippets"))) or ("locating bug code snippets"))*.