Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vong doi cu snippets" » "trong doi cu snippets", "huong doi cu snippets", "dung doi cu snippets", "vong doi cua snippets", "vong doi co snippets", "vong doi 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: (((("vong doi 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: (((("vong doi cu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vong doi cu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vong doi cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.