Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
trung tuan » trung thanh, tran tuan, truong thanh
soc thiet » hoc thiet, so thiet, toc thieu
dung cong » dung trong
thanh lap » thanh san, phan lap, thanh van
thanh hai » thanh phan, thanh hoa, thanh san
cong san » cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: soc thiet tach - thanh ((trung tuan) or (trung tam)) dung cong san ((thanh lap) OR (thanh hai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: soc thiet tach - thanh ((trung tuan) OR (trung tam)) dung cong san ((thanh lap) OR (thanh hai)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "soc thiet tach - thanh ((trung tuan) or (trung tam)) dung cong san ((thanh lap) OR (thanh hai))".
• Adding a wildcard symbol may retrieve word variants: soc thiet tach - thanh ((trung tuan) or (trung tam)) dung cong san ((thanh lap) OR (thanh hai))*.