Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
trung qua » trung quan, trung cua, truong quan
trong qua » trong quan, thong qua, trong nha
dung cong » dung trong
hoc hieu » hoc thieu, hoc hien, doc hieu
cong tan » cong tac, cong san, cong thanh
tran cao » toan cao, tran chau, trang cho

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 qua) or (trong qua)) dung cong tan tran cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - thanh ((trung qua) OR (trong qua)) dung cong tan tran cao.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - thanh ((trung qua) or (trong qua)) dung cong tan tran cao*.