Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
khong tung » khong dung, khong xuong, chong trung
trung cua » truong cua, trung cap, dung cua
chi tach » chiu trach, chiet tach, chi thanh
tung dan » dung dan, huong dan, trung dai
dan phan » doan phan, dan chan, van phan
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi tach - thanh ((trung cua) or (trung tuan)) khong tung dan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi tach - thanh ((trung cua) OR (trung tuan)) khong tung dan phan tu*.