Perhaps you should try some spelling variations:
"learning anh tu snippets" » "learning a tu snippets", "learning data tu snippets", "learning _ tu snippets", "learning anh tuan snippets", "learning anh tu slippers"
"creating a a snippets" » "creating _ a snippets", "reading a a snippets", "creating a 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: (((("learning anh tu snippets") or ("creating a a snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("learning anh tu snippets") OR ("creating a a snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( learning anh tu snippets ) or ( creating a a snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("learning anh tu snippets") or ("creating a a snippets"))) or ("locating bug code snippets"))*.