Perhaps you should try some spelling variations:
theo trieu » theo tieu, theo chieu, thep tieu
khung luan » chung luan, dung luan, hang luan
dung cong » dung trong
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cao » toan cao, thai cao, than cap
han cua » hang cua, nhan cua, than cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo trieu tinh - hanh ((khung luan) or (han cua)) dung cong tac than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo trieu tinh - hanh ((khung luan) OR (han cua)) dung cong tac than cao.
• Adding a wildcard symbol may retrieve word variants: theo trieu tinh - hanh ((khung luan) or (han cua)) dung cong tac than cao*.