Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu quoc do snippets" » "phu quoc do snippets", "tru quoc do snippets", "thuat quoc do snippets", "thu duoc do snippets", "thu nuoc do snippets", "thu quoc co 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 do 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 do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu quoc do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu quoc do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.