Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
hanh trang » thanh trung, canh tranh, hanh trinh
trang tuan » tran tuan, trung tuan, trong tuan
dang cong » dung cong
ho thiet » hoc thiet, hoa thiet, so thiet
thai cao » tai cao, thoai cac, thuat cao
thi cao » thi hao, thi bao, thi cam

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 trang tuan ((nhung bai) or (dang cong)) dinh ((thi cao) OR (thai cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho thiet tach - hanh trang tuan ((nhung bai) OR (dang cong)) dinh ((thi cao) OR (thai cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho thiet tach - hanh trang tuan ((nhung bai) or (dang cong)) dinh ((thi cao) OR (thai cao))".
• Adding a wildcard symbol may retrieve word variants: ho thiet tach - hanh trang tuan ((nhung bai) or (dang cong)) dinh ((thi cao) OR (thai cao))*.