Perhaps you should try some spelling variations:
thanh trung » thanh tung
thiet tach » chiet tach, thuat tach
thien hach » thien thanh, hien hanh
trung tuan » trung thanh, trung tam, tran tuan
tuan hang » tuan hoang, tuan bang, tuan dang
hang cong » dang cong, hang nong, bang cong
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: hoc ((thiet tach) OR (thien hach)) - thanh trung tuan hang cong dan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thiet tach) OR (thien hach)) - thanh trung tuan hang cong dan toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thiet tach) OR (thien hach)) - thanh trung tuan hang cong dan toan cau*.