Perhaps you should try some spelling variations:
"trang doan cua snippets" » "tran doan cua snippets", "trong doanh cua snippets", "trang tuan cua snippets", "trang doanh cua snippets", "trang dan cua snippets", "trang toan cua 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 doan cua 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 doan cua snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trang doan cua snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trang doan cua snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.