Perhaps you should try some spelling variations:
"locating bugs code slippers" » "locating bugs code snippets", "locating bug code slippers"
"python using java snippets" » "python using data snippets"
"hoc anh dan snippets" » "hoc nganh dan snippets", "hoc nhanh dan snippets", "hoc sinh dan snippets", "hoc anh dang snippets", "hoc anh danh snippets", "hoc canh dan 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 anh dan snippets") or ("python using java snippets"))) or ("locating bugs code slippers"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoc anh dan snippets") OR ("python using java snippets"))) OR ("locating bugs code slippers")).
• Removing quotes may allow a broader search: (((( hoc anh dan snippets ) or ( python using java snippets ))) or ( locating bugs code slippers )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc anh dan snippets") or ("python using java snippets"))) or ("locating bugs code slippers"))*.