Perhaps you should try some spelling variations:
"van trong code snippets" » "van trong cong snippets", "van trong co snippets", "van trong che snippets", "van truong code snippets", "vang trong code snippets", "ban trong code snippets", "van trong code slippers"
"using _ java snippets" » "using _ java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("using _ java snippets") or ("van trong code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using _ java snippets") OR ("van trong code snippets"))) OR ("locating bug code snippets"))*.
• Removing quotes may allow a broader search: (((( using _ java snippets ) or ( van trong code snippets ))) or ( locating bug code snippets ))*.