Perhaps you should try some spelling variations:
"duong java java snippets" » "duong va java snippets"
"dong hang cong snippets" » "dong bang cong snippets", "dong hung cong snippets", "dong nang cong snippets", "dong dang cong snippets", "dong hang nong snippets", "dong thanh cong 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: (((("duong java java snippets") or ("dong hang cong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duong java java snippets") OR ("dong hang cong snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong java java snippets ) or ( dong hang cong snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong java java snippets") or ("dong hang cong snippets"))) or ("locating bug code snippets"))*.