Perhaps you should try some spelling variations:
"python using code snippets" » "python using cfd snippets", "python using one snippets"
"locating bug core snippets" » "locating bug code snippets"
"tri thi hai snippets" » "tri tai hai snippets", "tai thi hai snippets", "thi thi hai snippets", "tri thi mai snippets", "tri thi hanh snippets"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"python using code snippets\") OR (\"tri thi hai snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( python using code snippets ) OR ( tri thi hai snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("python using code snippets") OR ("tri thi hai snippets"))) OR ("locating bug core snippets"))*.