Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"phieu de cua snippets" » "phieu de code snippets", "hieu ve cua snippets", "chieu ke cua snippets", "hieu he cua snippets", "phieu le cua snippets", "phieu te cua snippets", "phieu dieu 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: (((("phieu de 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: (((("phieu de cua snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( phieu de cua snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phieu de cua snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.