Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, nghiep nganh
chiet tach » chieu sach
hanh trung » thanh trung, hanh trang, manh trung
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, dieu hanh, hien hanh
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((((hieu manh) OR (hieu nganh))) or (chiet tach)) - hanh trung cua nhung cong tan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((((hieu manh) OR (hieu nganh))) OR (chiet tach)) - hanh trung cua nhung cong tan than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((((hieu manh) OR (hieu nganh))) or (chiet tach)) - hanh trung cua nhung cong tan than cao".
• Adding a wildcard symbol may retrieve word variants: doi ((((hieu manh) OR (hieu nganh))) or (chiet tach)) - hanh trung cua nhung cong tan than cao*.