Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, chien tranh
nhung cong » dung cong, thong cong, hang cong
hien hanh » dieu hanh
thang cua » thong cua, hang cua, than cua
trung cua » truong cua, trung tuan, trung cap
cong dan » cong san, cong tan, huong dan
dan han » dan chan, dan than, dan hanh
han tu » phan tu, hanh tu, ban tu

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 thanh) or (hien hanh)) - hanh ((thang cua) or (trung cua)) nhung cong dan han tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien thanh) OR (hien hanh)) - hanh ((thang cua) OR (trung cua)) nhung cong dan han tu.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien thanh) or (hien hanh)) - hanh ((thang cua) or (trung cua)) nhung cong dan han tu*.