Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using data snippets" » "python using java snippets", "python using sat snippets", "python missing data snippets"
"roi luoc dai snippets" » "roi nuoc dai snippets", "tom luoc dai snippets", "dai luoc dai snippets", "roi cuoc doi snippets", "roi hoc dai snippets", "roi duc dai 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: (((("roi luoc dai snippets") or ("python using data snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("roi luoc dai snippets") OR ("python using data snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( roi luoc dai snippets ) or ( python using data snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("roi luoc dai snippets") or ("python using data snippets"))) or ("locating bug core snippets"))*.