Perhaps you should try some spelling variations:
hien thanh » thien thanh, hien hanh, tien thanh
thuc hien » hoc hien
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
dung cong » dung trong
thuat dam » thuat cam, thuat do, thuat xay
ki thuat » ky thuat
cong ki » cong kim, cong khi, cong li

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuc hien thanh - thanh ((trung cua) or (trung cap)) dung cong ki thuat dam~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuc hien thanh - thanh ((trung cua) OR (trung cap)) dung cong ki thuat dam.
• Adding a wildcard symbol may retrieve word variants: thuc hien thanh - thanh ((trung cua) or (trung cap)) dung cong ki thuat dam*.