Perhaps you should try some spelling variations:
"vi trinh cong snippets" » "vi trinh code snippets", "vi trinh dung snippets", "vi tinh cong snippets", "va trinh cong snippets", "viet trinh cong snippets"
"locating bug core snippets" » "locating bug code snippets"
"using java java snippets" » "using data java snippets"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("vi trinh cong snippets") OR ("using java java snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( vi trinh cong snippets ) or ( using java java snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("vi trinh cong snippets") or ("using java java snippets"))) or ("locating bug core snippets"))*.