Perhaps you should try some spelling variations:
thanh trung » thanh tung
thiet tach » thien hach, thuat tach
chiet tach » chieu sach
toan thanh » hoan thanh, toan thang, tan thanh
tran thanh » ban thanh, van thanh, quan thanh
trung cap » truong cao, trung tam
dung cong » dung trong
cap dung » ap dung, cao dung, chan dung

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 (chiet tach)) - thanh trung cap dung cong ((toan thanh) or (tran thanh)) chu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thiet tach) OR (chiet tach)) - thanh trung cap dung cong ((toan thanh) OR (tran thanh)) chu.
• Adding a wildcard symbol may retrieve word variants: hoc ((thiet tach) or (chiet tach)) - thanh trung cap dung cong ((toan thanh) or (tran thanh)) chu*.