Perhaps you should try some spelling variations:
"danh thuc ca snippets" » "dan thuc ca snippets", "anh thuc ca snippets", "dinh thuc ca snippets", "danh thuc cua snippets", "danh thuc can snippets", "danh thuc cao 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: (((("danh thuc ca snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("danh thuc ca snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh thuc ca snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh thuc ca snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.