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