Perhaps you should try some spelling variations:
"locating bugs code slippers" » "locating bug code slippers", "locating bugs code snippets"
"python using java snippets" » "python using data snippets"
"dung hoc 12 snippets" » "dong hoc 12 snippets", "dung thuoc 12 snippets", "trung hoc 12 snippets", "dung hoc 10 snippets", "dung hoc 11 snippets", "dung hoc 2012 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: (((("python using java snippets") or ("dung hoc 12 snippets"))) or ("locating bugs code slippers"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("dung hoc 12 snippets"))) OR ("locating bugs code slippers")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( dung hoc 12 snippets ))) or ( locating bugs code slippers )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("dung hoc 12 snippets"))) or ("locating bugs code slippers"))*.