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