Perhaps you should try some spelling variations:
"chieu sach java slippers" » "chinh sach java slippers", "chiet tach java slippers", "chieu sang java slippers", "chieu sach va slippers", "chieu sach java slippery", "chieu sach java grippers"
"dung java java snippets" » "dung va java 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: (((("chieu sach java slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chieu sach java slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chieu sach java slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chieu sach java slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.