Perhaps you should try some spelling variations:
"thi dieu code snippets" » "thi dieu che snippets", "thi dieu co snippets", "thi dieu con snippets", "thi lien code snippets", "thi hien code snippets", "vi dieu code snippets", "thi dieu code 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"

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 dieu code 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 dieu code snippets") OR ("python using a snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi dieu code snippets ) or ( python using a snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi dieu code snippets") or ("python using a snippets"))) or ("locating bug code snippets"))*.