Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van moi cua snippets" » "van muoi cua snippets", "van loi cua snippets", "ban moi cua snippets", "van hoi cua snippets", "van doi cua snippets", "van moi quan 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 moi cua 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 moi cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van moi cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van moi cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.