Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lan bach cau snippets" » "xuan bach cau snippets", "luon bach cau snippets", "lan anh cau snippets", "lan bac cau snippets", "lan bach mai snippets", "lan sach cap 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: (((("lan bach 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: (((("lan bach cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lan bach cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lan bach cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.