Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu quoc ve snippets" » "phu quoc ve snippets", "tru quoc ve snippets", "thuat quoc ve snippets", "thu quoc te snippets", "thu nuoc ve snippets", "thu quoc va 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: (((("thu quoc ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thu quoc ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu quoc ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu quoc ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.