Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luan rui cua snippets" » "luan chi cua snippets", "van rui cua snippets", "luan thi cua snippets", "luan cuoi cua snippets", "luan troi cua 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: (((("luan rui cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luan rui cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luan rui cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan rui cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.