Perhaps you should try some spelling variations:
"using java java snippets" » "using data java snippets", "using java java slippers"
"trinh van tan snippets" » "trinh han tan snippets", "trinh quan tan snippets", "trinh toan tan snippets", "trinh van tuan snippets", "trinh van ban snippets", "trinh van tai snippets", "trinh van tan slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

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

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