Perhaps you should try some spelling variations:
thanh tung » thanh cong
tung viet » trung viet, tuong viet, dung viet
viet dung » viet hung, viet huong, viet trung
dung cong » dung trong
khao cuu » cham cuu, chao chu, kho cua
cong san » cong tac
toan cao » toan ban
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: khao cuu tinh - thanh tung viet dung cong san ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: khao cuu tinh - thanh tung viet dung cong san ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: khao cuu tinh - thanh tung viet dung cong san ((toan cao) or (toan tap))*.