Perhaps you should try some spelling variations:
"dong doanh cach snippets" » "dong doanh code snippets", "dung doanh cach snippets", "trong doanh cach snippets", "doanh doanh cach snippets", "dong doanh dich snippets", "dong dan cach snippets", "dong doanh anh snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java 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: (((("dong doanh cach snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong doanh cach snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dong doanh cach snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong doanh cach snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.