Perhaps you should try some spelling variations:
"tren moi trinh snippets" » "tren doi trinh snippets", "tren hoi tinh snippets", "tren co trinh snippets", "tren mo trinh snippets", "trong moi trinh snippets", "thien moi trinh snippets", "tren moi 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: (((("tren moi 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: (((("tren moi trinh snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tren moi trinh snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tren moi trinh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.