Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cuong ve cua snippets" » "cuong vo cua snippets", "duong ve cua snippets", "luong va cua snippets", "cuong le cua snippets", "cuong de cua snippets", "cuong te cua snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("cuong ve cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cuong ve cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cuong ve cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cuong ve cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.