Perhaps you should try some spelling variations:
"trang trinh ve snippets" » "tra trinh ve snippets", "trang tri ve snippets", "thanh trinh ve snippets", "trang trinh he snippets", "trang trinh va snippets", "trang trinh vi snippets"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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

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