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