Perhaps you should try some spelling variations:
chiet tach » chieu sach
hieu nganh » vien nganh, hiem ngan, hieu manh
hanh trang » thanh trung, canh tranh, hanh trinh
nhung cong » dung cong, thong cong, hang cong
trang cua » tranh cua, tang cua, trung cua
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 ((((dieu hanh) or (hieu nganh))) or (chiet tach)) - hanh trang cua nhung cong tan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((((dieu hanh) OR (hieu nganh))) OR (chiet tach)) - hanh trang cua nhung cong tan than cao.
• Adding a wildcard symbol may retrieve word variants: doi ((((dieu hanh) or (hieu nganh))) or (chiet tach)) - hanh trang cua nhung cong tan than cao*.