Perhaps you should try some spelling variations:
thuat tach » thuat sach, thuat mach, thuat tac
thanh tung » thanh cong
soc thuat » hoc thuat, cac thuat, soc thiet
tung tran » trung tran, hung tran, huong tran
tran dung » tran dang, tran hung, tran quang
thanh lap » thanh san, phan lap, thanh hai
cong lon » cong luong, cong dong, cong cong
dong son » dong von, dong san, hoang son

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

• Performing a fuzzy search may retrieve terms with similar spellings: soc thuat tach - thanh tung tran dung ((cong lon) or (dong son)) thanh lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: soc thuat tach - thanh tung tran dung ((cong lon) OR (dong son)) thanh lap.
• Adding a wildcard symbol may retrieve word variants: soc thuat tach - thanh tung tran dung ((cong lon) or (dong son)) thanh lap*.