Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van thi cua snippets" » "van thi code snippets", "van tai cua snippets", "dan thi cua snippets", "van thu cua snippets", "van thai cua snippets", "van thi cuc snippets", "van tri cua 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 thi cua 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 thi cua snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( van thi cua snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van thi cua snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.