Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
nhung cong » dung cong, thong cong, hang cong
thanh toan » thanh hoa, thanh san, tinh toan
hanh tang » hanh trang, anh tang, hanh mang
cua nhung » va nhung
van thanh » ban thanh, van tuan
dien anh » tieng anh, dien dan
tang cua » mang cua, hang cua, tang luan
cong van » cong vang, cong san, song van

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 hach) or (dien anh)) - hanh tang cua nhung cong van thanh toan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien hach) OR (dien anh)) - hanh tang cua nhung cong van thanh toan*.