Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"choi dac cho snippets" » "choi dan cho snippets", "cuoi dac cho snippets", "cho cac cho snippets", "choi day cho snippets", "choi 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: (((("choi 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: (((("choi dac cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( choi dac cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("choi dac cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.