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