Perhaps you should try some spelling variations:
"dong cac chien snippets" » "dong cac code snippets", "dong cuoc chien snippets", "dong van chien snippets", "dong nam chien snippets", "duong cac chien snippets", "dong bac chien snippets", "dung cac chien 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: (((("dung java java snippets") or ("dong cac chien snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("dong cac chien snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dong cac chien snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dong cac chien snippets"))) or ("locating bug core snippets"))*.