Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"mot chieu ve snippets" » "mot chien ve snippets", "doi chieu ve snippets", "ho chieu ve snippets", "mot hieu ve snippets", "mot chieu ke snippets", "mot thieu ve 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: (((("mot chieu 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: (((("mot chieu ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( mot chieu ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("mot chieu ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.