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