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