Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van dan che snippets" » "van dan code snippets", "van ban che snippets", "ban dan che snippets", "van dao che snippets", "van han che snippets", "van dan cho snippets", "van dan he snippets"
"python using java snippets" » "python using data 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 che snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van dan che snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( van dan che snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van dan che snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.