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