Perhaps you should try some spelling variations:
trung tuan » trung thanh, tran tuan, truong thanh
hien hanh » dieu hanh
trung cap » truong cao
van thanh » ban thanh, van tuan
thanh tap » thanh lap, thanh tai, thanh tay
dung ung » dung cong
ung van » dung van, vung van, cung van

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - hanh ((((trung cap) OR (trung tam))) OR (trung tuan)) dung ung van thanh tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien hanh - hanh ((((trung cap) OR (trung tam))) or (trung tuan)) dung ung van thanh tap~".
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - hanh ((((trung cap) OR (trung tam))) or (trung tuan)) dung ung van thanh tap*.