Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"son dung cho snippets" » "son dung code snippets", "son duong cho snippets", "so dung cho snippets", "son tung cho snippets"
"python using data snippets" » "python using java snippets", "python using sat snippets", "python missing data 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: (((("son dung cho snippets") or ("python using data snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("son dung cho snippets") OR ("python using data snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( son dung cho snippets ) or ( python using data snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("son dung cho snippets") or ("python using data snippets"))) or ("locating bug core snippets"))*.