Perhaps you should try some spelling variations:
"tan van trinh slippers" » "tan van thinh slippers", "tan van tinh slippers", "tan dan trinh slippers", "tran van trinh slippers", "tang van trinh slippers", "luan van trinh slippers", "tan van trinh slippery", "tan van 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: (((("tan van 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: (((("tan van trinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tan van trinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tan van trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.