Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van khong co snippets" » "van phong co snippets", "van khang co snippets", "va khong co snippets", "van thong co snippets", "van khong lo snippets", "van khong bao 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 khong co 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 khong co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van khong co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van khong co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.