Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"thong tu model snippets" » "phong tuc model snippets", "thong tin model snippets", "thong ke model snippets", "thong a model snippets", "thong 1 model snippets", "thong _ model 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 tu model 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 tu model snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thong tu model snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thong tu model snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.