Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van luc chan snippets" » "van luc nhan snippets", "van luu chan snippets", "van buoc chan snippets", "van loc chan snippets", "van duc chan snippets", "van lu chan 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: (((("python using java snippets") or ("van luc chan snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("van luc chan snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( van luc chan snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("van luc chan snippets"))) or ("locating bug code snippets"))*.