Perhaps you should try some spelling variations:
"reading a a snippets" » "reading _ a snippets", "reading 1 a snippets", "reading 2 a snippets", "reading a a slippers"
"creating viet duc snippets" » "creating viet dung snippets", "creating viet duc 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: (((("reading a a snippets") or ("creating viet duc snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("reading a a snippets") OR ("creating viet duc snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( reading a a snippets ) or ( creating viet duc snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("reading a a snippets") or ("creating viet duc snippets"))) or ("locating bug code snippets"))*.