Perhaps you should try some spelling variations:
"thi doan minh snippets" » "thi doan hinh snippets", "thi doan tinh snippets", "thi hoang minh snippets", "thai doan minh snippets", "thi hoan minh snippets", "thi loan minh snippets", "thi doan minh slippers"
"python using a snippets" » "python using a 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 doan minh snippets") or ("python using a snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thi doan minh snippets") OR ("python using a snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi doan minh snippets ) or ( python using a snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi doan minh snippets") or ("python using a snippets"))) or ("locating bug code snippets"))*.