Perhaps you should try some spelling variations:
"vi trinh code snippets" » "vi trinh cong snippets", "vi trinh co snippets", "vi trinh cad snippets", "vi tinh code snippets", "va trinh code snippets", "viet 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: (((("vi 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: (((("vi trinh code snippets") OR ("using java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( vi trinh code snippets ) or ( using java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vi trinh code snippets") or ("using java java snippets"))) or ("locating bug core snippets"))*.