Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, chien tranh
thanh trung » thanh tung
trung pham » trung phan, tung pham, trung phat
hien hanh » dieu hanh
pham hang » pham hoang, pham hong, pham hanh
hang dong » hang nong, hang cong, hanh dong
dong tac » cong tac, dong tai, dong bac
tac than » tac thanh, tam than, tac nhan
than cap » khan cap, thanh lap, thanh cac

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)) - thanh trung pham hang dong tac than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien thanh) OR (hien hanh)) - thanh trung pham hang dong tac than cap.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien thanh) or (hien hanh)) - thanh trung pham hang dong tac than cap*.