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