Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"kho tre cua snippets" » "khoe tre cua snippets", "khoa tre cua snippets", "cho tre cua snippets", "kho te cua snippets", "kho tue cua 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 tre cua 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 tre cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( kho tre cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("kho tre cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.