Perhaps you should try some spelling variations:
thiet danh » thien danh, thien anh, thien dang
nhung cong » dung cong, thong cong, hang cong
tuan thanh » thuan thanh, quan thanh, tran thanh
hoc thiet » hoc thieu, hoc thuyet, hoc hien
trung cua » truong cua, trung tuan, thong cua
trung cap » truong cao, trung tam
cong tuan » cong tan, cong luan, cong thanh
thanh lap » thanh san, phan lap, thanh hai
dung cua » dung luan, dung cho

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet danh - thanh ((((trung cua) OR (dung cua))) OR (trung cap)) nhung cong tuan thanh lap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet danh - thanh ((((trung cua) OR (dung cua))) or (trung cap)) nhung cong tuan thanh lap~".
• Adding a wildcard symbol may retrieve word variants: hoc thiet danh - thanh ((((trung cua) OR (dung cua))) or (trung cap)) nhung cong tuan thanh lap*.