Perhaps you should try some spelling variations:
"doanh tao trinh snippets" » "doanh tai trinh snippets", "doanh bao trinh snippets", "doanh cao trinh snippets", "doanh tao tinh snippets", "doanh tho trinh snippets", "doanh giao trinh snippets", "doanh tao 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: (((("doanh tao 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: (((("doanh tao trinh snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doanh tao trinh snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doanh tao trinh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.