Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khao hoc cac snippets" » "thao hoc cac snippets", "khao phuc cac snippets", "khoa hoc cac snippets", "khao hoc cao 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: (((("khao hoc cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khao hoc cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khao hoc cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khao hoc cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.