Perhaps you should try some spelling variations:
thien danh » thien anh, thien dang, thien thanh
hien hanh » dieu hanh
toan thuc » toan hoc, dan thuc, nhan thuc
thuc dung » thuoc dung, thuy dung, tuc dung
dung cong » dung trong
cong than » cong thanh, cong thang, cong tan
than phan » thanh phan, toan phan, thanh pham
phan lap » phan dau

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

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