Perhaps you should try some spelling variations:
"python using data snippets" » "python using java snippets", "python using sat snippets", "python missing data snippets"
"van cuu cong snippets" » "van cua cong snippets", "van thu cong snippets", "van cac cong snippets", "van cau cong snippets", "van chu cong snippets", "van cu cong snippets"
"locating bug code snippets" » "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: (((("python using data snippets") or ("van cuu cong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using data snippets") OR ("van cuu cong snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using data snippets ) or ( van cuu cong snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using data snippets") or ("van cuu cong snippets"))) or ("locating bug code snippets"))*.