Perhaps you should try some spelling variations:
"tung pham hanh snippets" » "hung pham hanh snippets", "nhung pham hanh snippets", "trung phan hanh snippets", "tung pham thanh snippets", "tung pham anh snippets", "tung pham hang snippets", "tung pham hanh slippers"
"dung java java snippets" » "dung va java snippets", "dung 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: (((("tung pham hanh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tung pham hanh snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tung pham hanh snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tung pham hanh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.