Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"tu lieu cua snippets" » "tu lieu code snippets", "tu dieu cua snippets", "tu bieu cua snippets", "tu hieu cua snippets", "du lieu cua snippets", "tu liem cua snippets", "tai lieu 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: (((("tu lieu 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: (((("tu lieu cua snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( tu lieu cua snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tu lieu cua snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.