Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"sach thu cua snippets" » "sach thu code snippets", "sach thue cua snippets", "sach thieu cua snippets", "sach tham cua snippets", "sach thuc cua snippets", "sach hu cua snippets", "sach tu 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: (((("sach thu 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: (((("sach thu cua snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( sach thu cua snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach thu cua snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.