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
cong dang » cong dong, cong dan, cong dung
dang phan » dung phan, nang phan, dang phat
so thiet » soc thiet, hoc thiet, hoa thiet
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 dang phan lap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so thiet tach - thanh tung ((tran dung) OR (tran quang)) cong dang phan lap".
• Adding a wildcard symbol may retrieve word variants: so thiet tach - thanh tung ((tran dung) OR (tran quang)) cong dang phan lap*.