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