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