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