Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach
thuat tach » thuat sach, thuat mach, thuat tac
trung tuan » trung thanh, trung tam, tran tuan
dung cong » dung trong
san thanh » ban thanh, van thanh, son thanh
thanh lap » thanh san, phan lap, thanh hai
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) or (thuat tach)) - thanh ((trung tuan) or (tran quang)) dung cong san thanh lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: soc ((thiet tach) OR (thuat tach)) - thanh ((trung tuan) OR (tran quang)) dung cong san thanh lap.
• Adding a wildcard symbol may retrieve word variants: soc ((thiet tach) or (thuat tach)) - thanh ((trung tuan) or (tran quang)) dung cong san thanh lap*.