Perhaps you should try some spelling variations:
hien danh » thien danh, hien hanh, hien nhanh
toan thuc » toan hoc, dan thuc, nhan thuc
dung cong » dung trong
hang cong » dang cong, bang cong, thanh cong
hang nong » thang long, han tong
than phan » thanh phan, toan phan, thanh pham
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien danh - tinh toan thuc ((dung cong) or (((hang cong) or (hang nong)))) than phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien danh - tinh toan thuc ((dung cong) OR (((hang cong) OR (hang nong)))) than phan cac.
• Adding a wildcard symbol may retrieve word variants: hoc hien danh - tinh toan thuc ((dung cong) or (((hang cong) or (hang nong)))) than phan cac*.