Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
hieu manh » chieu xanh, hieu nganh, dieu hanh
trung cua » truong cua, trung cap, dung cua
hoc hieu » hoc thieu, hoc hien, doc hieu
cong tac » cong ty
cong tan » cong san, cong thanh, cong ty
toan cao » toan ban, toan tap

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 manh - thanh ((trung cua) OR (trung tuan)) dung ((cong tac) or (cong tan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - thanh ((trung cua) OR (trung tuan)) dung ((cong tac) OR (cong tan)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - thanh ((trung cua) OR (trung tuan)) dung ((cong tac) or (cong tan)) toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - thanh ((trung cua) OR (trung tuan)) dung ((cong tac) or (cong tan)) toan cao*.