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