Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dung quang can snippets" » "dung quang code snippets", "dang quang can snippets", "luong quang can snippets", "dung luan can snippets", "dung quang chan snippets", "dung quang cao snippets", "dung quang ban 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 quang can snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung quang can snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung quang can snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung quang can snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.