Perhaps you should try some spelling variations:
"dang using data snippets" » "dang sinh data snippets", "data using data snippets", "dang ung data snippets", "dang using java snippets", "dang using sat snippets", "dang missing data snippets"
"dong danh cac snippets" » "dong doanh cac snippets", "dong anh cac snippets", "cong danh cac snippets", "dong dinh cac snippets", "dong danh ca snippets", "dong hanh cac 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: (((("dang using data snippets") or ("dong danh cac snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang using data snippets") OR ("dong danh cac snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang using data snippets ) or ( dong danh cac snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang using data snippets") or ("dong danh cac snippets"))) or ("locating bug code snippets"))*.