Perhaps you should try some spelling variations:
"dung thi doan snippets" » "dung thi code snippets", "dung tai doan snippets", "dung tri doan snippets", "dung chi doan snippets", "dung thai doan snippets", "dung thi hoan snippets", "dung thi loan snippets"
"locating bug core snippets" » "locating bug code snippets"
"data using java snippets" » "data using data snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("data using java snippets") or ("dung thi doan snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("data using java snippets") OR ("dung thi doan snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( data using java snippets ) or ( dung thi doan snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("data using java snippets") or ("dung thi doan snippets"))) or ("locating bug core snippets"))*.