Perhaps you should try some spelling variations:
"cong dung chou snippets" » "cong dung code snippets", "cuong dung chou snippets", "cong dong chou snippets", "cong luong chou snippets", "cong dung cho snippets", "cong dung chau snippets", "cong chung chou 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: (((("cong dung chou snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong dung chou snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cong dung chou snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong dung chou snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.