Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lanh dac cho snippets" » "lanh dao cho snippets", "lan dac cho snippets", "anh duc cho snippets", "lanh day cho snippets", "lanh danh cho 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: (((("lanh dac cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lanh dac cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lanh dac cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lanh dac cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.