Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
thanh tung » thanh cong
tran dung » tran dang, tran hung, trung dung
so thiet » soc thiet, hoc thiet, hoa thiet
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
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: so thiet tach - thanh tung ((tran dung) or (tran quang)) cong dan phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so thiet tach - thanh tung ((tran dung) OR (tran quang)) cong dan phan lap.
• Adding a wildcard symbol may retrieve word variants: so thiet tach - thanh tung ((tran dung) or (tran quang)) cong dan phan lap*.