Perhaps you should try some spelling variations:
"dan toan trac snippets" » "dan toan tran snippets", "dan thoan tran snippets", "dan toan tap snippets", "van toan trac snippets", "dan than trac snippets", "manh toan trac snippets", "dan toan trac slippers"
"hang java java snippets" » "hang va java snippets", "hang java java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("dan toan trac snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan toan trac snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan toan trac snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan toan trac snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.