Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khao hoc cho snippets" » "thao hoc cho snippets", "khao phuc cho snippets", "khoa hoc cho snippets", "khao hoc cao snippets", "khao hoc pho snippets", "khao hoc co 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 cho 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 cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khao hoc cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khao hoc cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.