Perhaps you should try some spelling variations:
"chu dan trinh snippets" » "chu dan tinh snippets", "chu van trinh snippets", "chu hanh trinh snippets", "chua dan trinh snippets", "chu han trinh snippets", "chu dan trinh 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: (((("chu dan trinh snippets") or ("python using a snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chu dan trinh snippets") OR ("python using a snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chu dan trinh snippets ) or ( python using a snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chu dan trinh snippets") or ("python using a snippets"))) or ("locating bug code snippets"))*.