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