Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van han cua snippets" » "van hanh cua snippets", "van phan cua snippets", "van nhan cua snippets", "van hang cua snippets", "van than 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 han 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 han cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van han cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van han cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.