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