Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lan thue che snippets" » "lan thu che snippets", "dan thue che snippets", "lam thue che snippets", "lan thuat che snippets", "lan thue theo snippets", "lan thue thu 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 thue che 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 thue che snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lan thue che snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lan thue che snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.