Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets"
"dung using java snippets" » "dung ung java snippets", "dung sinh java snippets", "dung uong java snippets", "dung using data snippets"
"duong van hoc snippets" » "duong va hoc snippets", "luong va hoc snippets", "dang van hoc snippets", "duong van hoa 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 using java snippets") or ("duong van hoc snippets"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung using java snippets") OR ("duong van hoc snippets"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( dung using java snippets ) or ( duong van hoc snippets ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung using java snippets") or ("duong van hoc snippets"))) or ("locating bugs code snippets"))*.