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