Perhaps you should try some spelling variations:
"van thanh code snippets" » "van thanh cong snippets", "van thanh de snippets", "ban thanh code snippets", "van tuan code snippets", "van thanh code slippers"
"dong cac code snippets" » "duong cac code snippets", "dong bac code snippets", "dung cac code snippets", "dong cac cong snippets", "dong cac co snippets", "dong cac che snippets", "dong cac 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: (((("dong cac code snippets") or ("van thanh code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong cac code snippets") OR ("van thanh code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong cac code snippets ) or ( van thanh code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong cac code snippets") or ("van thanh code snippets"))) or ("locating bug code snippets"))*.