Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"kim nhung cu snippets" » "kim dung cu snippets", "cam nhung cu snippets", "kim huong cu snippets", "kim nhung cau snippets", "kim nhung chu snippets", "kim chung cu 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: (((("kim nhung cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("kim nhung cu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( kim nhung cu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("kim nhung cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.