Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi van tre snippets" » "thi lan tre snippets", "thi hanh tre snippets", "thi nang tre snippets", "thi van tren snippets", "thi van te snippets", "thi ban tre 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 van tre 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 van tre snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi van tre snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi van tre snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.