Perhaps you should try some spelling variations:
"dung nhung code snippets" » "dung chung code snippets", "dung nhan code snippets", "dung trung code snippets", "dung nhung cong snippets", "dung nhung con snippets", "dung nhung code slippers"
"van lam code snippets" » "van lbm code snippets", "van lam co snippets", "van nam code snippets", "van lam 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 lam code snippets") or ("dung nhung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van lam code snippets") OR ("dung nhung code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van lam code snippets ) or ( dung nhung code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van lam code snippets") or ("dung nhung code snippets"))) or ("locating bug code snippets"))*.