Perhaps you should try some spelling variations:
"trinh hanh thi slippers" » "trinh thanh thi slippers", "trinh han thi slippers", "trinh anh thi slippers", "trinh nhanh thi slippers", "trinh hanh thoi slippers", "trinh hanh thi slippery", "trinh hanh thi 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: (((("dung java java snippets") or ("trinh hanh thi slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("trinh hanh thi slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( trinh hanh thi slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("trinh hanh thi slippers"))) or ("locating bug code snippets"))*.