Perhaps you should try some spelling variations:
"hoc tai trinh snippets" » "hoc tao trinh snippets", "hoc thi trinh snippets", "hoc tai tinh snippets", "hoc dai trinh snippets", "hoc tap trinh snippets", "hoc bai trinh snippets", "hoc tai trinh slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("hoc tai trinh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoc tai trinh snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc tai trinh snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc tai trinh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.