Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nen nam cau snippets" » "den nam cau snippets", "nen lam cau snippets", "yen nam cau snippets", "nen nam cao snippets", "nen nam cac snippets", "nen nam ca 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: (((("nen nam cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nen nam cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nen nam cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nen nam cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.