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