Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van hai cuc snippets" » "van ha cuc snippets", "van chat cuc snippets", "van hanh cuc snippets", "van tai cuc snippets", "van hai cua snippets", "van thai cua 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: (((("van hai cuc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van hai cuc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van hai cuc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van hai cuc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.