Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
thanh cham » thanh cha, hanh cham, thanh chau
thanh pham » thanh phan, thanh pho, thanh hai
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung cap, dung cua
cong cong » cong dong, trong cong, dung cong
hoc hieu » hoc thieu, hoc hien, doc hieu
cong tac » cong ty

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu lang - hanh ((trung cua) or (trung tuan)) cong cong tac ((thanh cham) OR (thanh pham))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - hanh ((trung cua) OR (trung tuan)) cong cong tac ((thanh cham) OR (thanh pham)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu lang - hanh ((trung cua) or (trung tuan)) cong cong tac ((thanh cham) OR (thanh pham))".
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - hanh ((trung cua) or (trung tuan)) cong cong tac ((thanh cham) OR (thanh pham))*.