Perhaps you should try some spelling variations:
"han quoc trinh slippers" » "han quoc thinh slippers", "han qua trinh slippers", "han quy trinh slippers", "phan quoc trinh slippers", "nhan quoc trinh slippers", "hanh quoc trinh slippers", "han quoc trinh slippery", "han quoc trinh 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: (((("han quoc trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("han quoc trinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( han quoc trinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("han quoc trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.