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