Perhaps you should try some spelling variations:
"nhung tri trinh snippets" » "nhung bai trinh snippets", "nhung bi trinh snippets", "nhung gi trinh snippets", "nhung tra trinh snippets", "nhung thi trinh snippets", "nhung tri tinh snippets", "nhung tri trinh slippers"
"dung dat code snippets" » "dung va code snippets", "dung tai code snippets", "dung rate code snippets", "dung dat de snippets", "dung dat code slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code 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: (((("nhung tri trinh snippets") or ("dung dat code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhung tri trinh snippets") OR ("dung dat code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhung tri trinh snippets ) or ( dung dat code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhung tri trinh snippets") or ("dung dat code snippets"))) or ("locating bug code snippets"))*.