Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vao moi cau snippets" » "va moi cau snippets", "vat moi cau snippets", "vao hoi cau snippets", "vao loi cau snippets", "vao gioi cau 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: (((("vao moi cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("vao moi cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vao moi cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vao moi cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.