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