Perhaps you should try some spelling variations:
"truan hoc trinh snippets" » "truyen hoc trinh snippets", "truong hoc trinh snippets", "trung hoc trinh snippets", "truan doc trinh snippets", "truan hoc tinh snippets", "truan hoc sinh snippets", "truan hoc 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: (((("truan hoc 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: (((("truan hoc trinh snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( truan hoc trinh snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("truan hoc trinh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.