Perhaps you should try some spelling variations:
"thanh van code snippets" » "thanh san code snippets", "thanh toan code snippets", "thanh phan code snippets", "thanh van de snippets", "thanh van hoe snippets", "thanh van cong snippets", "thanh van code slippers"
"dung bug code snippets" » "dung dung code snippets", "dung hung code snippets", "dung rung code snippets", "dung bug code slippers"
"locating bug code snippets" » "locating bug code slippers"

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: (((("thanh van code snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thanh van code snippets") OR ("dung bug code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thanh van code snippets ) or ( dung bug code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thanh van code snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))*.