Perhaps you should try some spelling variations:
thanh trung » thanh tung
thiet tach » chiet tach, thien hach, thuat tach
trung quan » truong quan, trong quan, trung tuan
dong doanh » dung doanh, trong doanh, doanh doanh
hoc thiet » hoc thieu, hoc thuyet, hoc hien
quan dung » quang dung, quan duong, qua dung
cong doan » cong dan, cong hoan, cong san
phan lap » phan dau

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 - thanh trung quan dung ((cong doan) OR (dong doanh)) phan lap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet tach - thanh trung quan dung ((cong doan) OR (dong doanh)) phan lap".
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - thanh trung quan dung ((cong doan) OR (dong doanh)) phan lap*.