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