Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"hoc cau cua snippets" » "hoc cao cua snippets", "hoc cac cua snippets", "hoc can cua snippets", "hoc cau qua snippets", "hoc ca cua snippets", "hoc cu cua 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: (((("hoc cau cua snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoc cau cua snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc cau cua snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc cau cua snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.