Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dong tin ho snippets" » "thong tin ho snippets", "luong tin ho snippets", "dong kinh ho snippets", "dong tin hoc snippets", "dong tin hoi snippets", "dong tin so snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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 tin ho snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong tin ho snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong tin ho snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong tin ho snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.