Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
hien manh » tien manh, hieu manh, hien nhanh
hien hanh » dieu hanh
dung cua » dung luan, dung cho
cong tan » cong tac, cong san, cong thanh
tan hang » tan khang, ban hang, van hang
hang ca » hang va, nang cao, hang tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien manh) or (hien hanh)) - thanh ((trung tuan) or (dung cua)) trong cong tan hang ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien manh) OR (hien hanh)) - thanh ((trung tuan) OR (dung cua)) trong cong tan hang ca.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien manh) or (hien hanh)) - thanh ((trung tuan) or (dung cua)) trong cong tan hang ca*.