Perhaps you should try some spelling variations:
"thong thuong du snippets" » "thong thong du snippets", "hang thuong du snippets", "cong thuong du snippets", "thong truong du snippets", "thong thuong da snippets", "thong thuong de 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: (((("thong thuong du snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thong thuong du snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thong thuong du snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thong thuong du snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.