Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi anh tong snippets" » "thi anh trong snippets", "thi anh thong snippets", "thi anh dong snippets", "thi hanh tong snippets", "thi thanh tong snippets", "thich anh tong 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: (((("thi anh tong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thi anh tong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi anh tong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi anh tong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.