Perhaps you should try some spelling variations:
thien danh » thien dang, thien thanh, thien chanh
thien anh » tien anh, thien thanh, thien chanh
hanh dong » anh dong, ha dong
cong tan » cong tac, cong san, cong thanh
tan hanh » tan thanh, tang hanh, toan hanh
dong bac » dong bang, dong luc, dong hoc
bac phan » cac phan, bac thanh, bac thang
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: toc ((thien danh) or (thien anh)) - thanh cong tan hanh dong bac phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thien danh) OR (thien anh)) - thanh cong tan hanh dong bac phan lap.
• Adding a wildcard symbol may retrieve word variants: toc ((thien danh) or (thien anh)) - thanh cong tan hanh dong bac phan lap*.