Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tri canh cua snippets" » "thi canh cua snippets", "tri hanh cua snippets", "tri doanh cua snippets", "tri manh cua snippets", "tri anh 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: (((("tri canh 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: (((("tri canh cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tri canh cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tri canh cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.