Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chung vu hoi snippets" » "chung cu hoi snippets", "chung tu hoi snippets", "chung vi hoi snippets", "chung vu khoi snippets", "chung va hoi snippets", "chung vu hai 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: (((("chung vu hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chung vu hoi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chung vu hoi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chung vu hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.