Perhaps you should try some spelling variations:
"dung cao chat snippets" » "dung cao code snippets", "duong cao chat snippets", "dung cho chat snippets", "dung co chat snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung using java snippets" » "dung ung java snippets", "dung sinh java snippets", "dung uong java snippets", "dung using data snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung using java snippets") OR ("dung cao chat snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"dung using java snippets\") OR (\"dung cao chat snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( dung using java snippets ) OR ( dung cao chat snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung using java snippets") OR ("dung cao chat snippets"))) OR ("locating bug core snippets"))*.