Perhaps you should try some spelling variations:
"va trinh code snippets" » "va trinh cong snippets", "va trinh co snippets", "va trinh cad snippets", "van trinh code snippets", "va tinh code snippets", "lap trinh code snippets"
"using java java snippets" » "using data java snippets"
"locating bug core snippets" » "locating bug 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: (((("va trinh code snippets") or ("using java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("va trinh code snippets") OR ("using java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( va trinh code snippets ) or ( using java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("va trinh code snippets") or ("using java java snippets"))) or ("locating bug core snippets"))*.