Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cach hieu ve snippets" » "cach tieu ve snippets", "sach thieu ve snippets", "cach thien ve snippets", "cach hieu va snippets", "cach hieu van 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: (((("cach hieu ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cach hieu ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cach hieu ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cach hieu ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.