Perhaps you should try some spelling variations:
"data using java snippets" » "data using data snippets"
"dung anh toan snippets" » "dung danh toan snippets", "duong anh toan snippets", "dong anh toan snippets", "dung manh toan snippets", "dung anh tuan snippets", "dung thanh toan 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 anh toan snippets") or ("data using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung anh toan snippets") OR ("data using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung anh toan snippets ) or ( data using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung anh toan snippets") or ("data using java snippets"))) or ("locating bug code snippets"))*.