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