Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dung viec voi snippets" » "dung viec code snippets", "dung viet voi snippets", "dung vien voi snippets", "nhung viec voi snippets", "dung viec cuoi snippets", "dung viec va snippets", "dung viec so 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 viec voi 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 viec voi snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung viec voi snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung viec voi snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.