Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa cham he snippets" » "khoa kham he snippets", "khoa cam he snippets", "khoa chau he snippets", "khoa cham den snippets", "khoa cham hoi snippets", "khoa cham nen 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: (((("khoa cham he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa cham he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa cham he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa cham he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.