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