Perhaps you should try some spelling variations:
"dang using java snippets" » "dang sinh java snippets", "data using java snippets", "dang ung java snippets", "dang using data snippets", "dang using java slippers"
"dung tren code snippets" » "dung trong code snippets", "dung trung code snippets", "dung tren co snippets", "dung tren cong snippets", "dung tren com snippets", "dung tren code slippers"
"locating bug code snippets" » "locating bug code slippers", "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 using java snippets") or ("dung tren code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang using java snippets") OR ("dung tren code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang using java snippets ) or ( dung tren code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang using java snippets") or ("dung tren code snippets"))) or ("locating bug code snippets"))*.