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