Perhaps you should try some spelling variations:
toan thiet » hoan thien, luan thiet, toan tien
thiet tach » chiet tach, thien hach, thuat tach
hanh trinh » canh tranh
nhung cong » dung cong, thong cong, hang cong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: toan thiet tach - ((hanh trinh) or (hanh chinh)) va nhung cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toan thiet tach - ((hanh trinh) OR (hanh chinh)) va nhung cong dan than cau*.