Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tran xuan vo snippets" » "tran quang vo snippets", "tran van vo snippets", "tran xuan ho snippets", "tran xuan co snippets", "tran xuan vu 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: (((("tran xuan vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran xuan vo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran xuan vo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran xuan vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.