Perhaps you should try some spelling variations:
"dung tran thien snippets" » "dung tran hien snippets", "dung tran chien snippets", "dung tran tien snippets", "dung tren thien snippets", "hung tran thien snippets", "dang tran thien snippets", "dung tran thien slippers"
"hanh java java snippets" » "hanh va java snippets", "hanh java java slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("hanh java java snippets") or ("dung tran thien snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hanh java java snippets") OR ("dung tran thien snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hanh java java snippets ) or ( dung tran thien snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hanh java java snippets") or ("dung tran thien snippets"))) or ("locating bug code snippets"))*.