Perhaps you should try some spelling variations:
"dai van tin snippets" » "dao van tin snippets", "dai han tin snippets", "dai va tin snippets", "dai van tien snippets", "dai van tan snippets", "dai van thinh snippets", "dai van tin 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: (((("dai van tin snippets") or ("python using a snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dai van tin snippets") OR ("python using a snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dai van tin snippets ) or ( python using a snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dai van tin snippets") or ("python using a snippets"))) or ("locating bug code snippets"))*.