Perhaps you should try some spelling variations:
"trao doc trinh slippers" » "trao doc tinh slippers", "trao doi trinh slippers", "trao hoc trinh slippers", "thao duoc trinh slippers", "tao duoc trinh slippers", "trao doc trinh slippery", "trao doc 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: (((("trao doc 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: (((("trao doc trinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trao doc trinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trao doc trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.