Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
chiet tach » chieu sach
hanh nhung » anh nhung, canh nhung, doanh nhung
nhung cao » nhung cau, nung cao, nhung ca
dung cong » dung trong
cao dung » cao dang, cao dong, cao ung
cong van » cong vang, cong san, song van
van phan » van phong, van thanh, luan phan
phan cau » phan dau, phan cac, phan 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 hach) or (chiet tach)) - hanh nhung cao dung cong van phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien hach) OR (chiet tach)) - hanh nhung cao dung cong van phan cau*.