Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets"
"don thuan cong snippets" » "don thuat cong snippets", "don thuan phong snippets", "don thuan trong snippets", "dong thuan cong snippets", "dinh thuan cong snippets", "doan chuan cong snippets"
"dung java java snippets" » "dung va java 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: (((("don thuan cong snippets") or ("dung java java snippets"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("don thuan cong snippets") OR ("dung java java snippets"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( don thuan cong snippets ) or ( dung java java snippets ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("don thuan cong snippets") or ("dung java java snippets"))) or ("locating bugs code snippets"))*.