Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, nghiep nganh
hieu manh » chieu xanh, dieu hanh, hien hanh
hieu lang » chieu sang, hieu quang, nhieu tang
phan cang » phan cong, phan dang, phan cung
cang luan » tang luan, hang luan, cong luan
luan dong » luan cong, quan dong, luan nong
dong cong » duong cong, dung cong, dang cong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
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: doi ((((hieu manh) OR (hieu nganh))) or (hieu lang)) - phan cang luan dong cong manh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((((hieu manh) OR (hieu nganh))) OR (hieu lang)) - phan cang luan dong cong manh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((((hieu manh) OR (hieu nganh))) or (hieu lang)) - phan cang luan dong cong manh toan cao".
• Adding a wildcard symbol may retrieve word variants: doi ((((hieu manh) OR (hieu nganh))) or (hieu lang)) - phan cang luan dong cong manh toan cao*.