Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van tu cho snippets" » "van thu cho snippets", "van du cho snippets", "ban tu cho snippets", "van tu choi snippets", "van tu chon snippets", "van cu cho 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 tu cho 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 tu cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van tu cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van tu cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.