Perhaps you should try some spelling variations:
"dong cau cham snippets" » "dong cau code snippets", "cong cau cham snippets", "dong cac cham snippets", "dong mau cham snippets", "dong ca cham snippets", "dong cau chan snippets", "dong cau chap 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 cau 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: (((("dong cau cham snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dong cau cham snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong cau cham snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.