Perhaps you should try some spelling variations:
"cong phuc cham snippets" » "cong phuc code snippets", "cong thuc cham snippets", "cong chuc cham snippets", "cong phu cham snippets", "cong phuc cam snippets", "cong phuc chau snippets", "cong thuc pham 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 phuc cham 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 phuc cham snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cong phuc cham snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong phuc cham snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.