Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
trinh luan » trinh luat, trinh quan, trinh han
nhung cong » dung cong, thong cong, hang cong
ho thiet » hoc thiet, hoa thiet, so thiet
tinh cua » trinh cua, sinh cua, tinh chat
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho thiet tach - hanh ((trinh luan) or (tinh cua)) nhung cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho thiet tach - hanh ((trinh luan) OR (tinh cua)) nhung cong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: ho thiet tach - hanh ((trinh luan) or (tinh cua)) nhung cong dan toan cau*.