Perhaps you should try some spelling variations:
"hoang sinh cong snippets" » "hoang minh cong snippets", "hoang dinh cong snippets", "hoang vinh cong snippets", "hoang trinh cong snippets", "hoang chinh cong snippets"
"dung java java snippets" » "dung va java 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: (((("dung java java snippets") or ("hoang sinh cong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("hoang sinh cong snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( hoang sinh cong snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("hoang sinh cong snippets"))) or ("locating bug code snippets"))*.