Perhaps you should try some spelling variations:
"tinh tra trinh snippets" » "tinh qua trinh snippets", "tinh tri trinh snippets", "tinh trang trinh snippets", "tinh toan trinh snippets"
"dung java java slippers" » "dung va java slippers", "dung java java slippery", "dung java java grippers"
"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: (((("tinh tra trinh snippets") or ("dung java java slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tinh tra trinh snippets") OR ("dung java java slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tinh tra trinh snippets ) or ( dung java java slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tinh tra trinh snippets") or ("dung java java slippers"))) or ("locating bug code snippets"))*.