Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lan thi cham snippets" » "lan thi hai snippets", "lan toc cham snippets", "lan thi ha snippets", "luan thi cham snippets", "loan thi cham snippets", "dan thi cham 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: (((("lan thi cham snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lan thi cham snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lan thi cham snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lan thi cham snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.