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