Perhaps you should try some spelling variations:
chung cong » nhung cong, chong cong, phung cong
luan chung » luan chinh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
cong tan » cong tac, cong san, cong thanh
toan cao » toan tap
toan ban » van ban
ha tinh » may tinh
va tinh » may tinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((ha tinh) or (va tinh)) - hanh tang luan chung cong tan ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((ha tinh) OR (va tinh)) - hanh tang luan chung cong tan ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: theo ((ha tinh) or (va tinh)) - hanh tang luan chung cong tan ((toan cao) or (toan ban))*.