Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van dan mot snippets" » "van ban mot snippets", "ban dan mot snippets", "van dao mot snippets", "van dan mon snippets", "van dau mot snippets", "van dan mo 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 dan mot 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 dan mot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van dan mot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van dan mot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.