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