Perhaps you should try some spelling variations:
"cong qua cham snippets" » "cong qua code snippets", "cong cua cham snippets", "song qua cham snippets", "cong quy cham snippets", "cong qua hai snippets", "cong qua cac snippets", "cong va cham 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 qua 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 qua cham snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cong qua cham snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong qua cham snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.