Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien nhanh » thien thanh, tien thanh, dien thanh
thong cong » trong cong, tong cong, thong thong
hien hanh » dieu hanh
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
cong dan » cong san, cong tan, huong dan
chan ban » can ban, chan nan, chan doan
chat ban » nhat ban, chat ran, cua ban

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 nhanh) OR (hien hanh)) - thanh trung cua thong cong dan ((chan ban) or (chat ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (hien hanh)) - thanh trung cua thong cong dan ((chan ban) OR (chat ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien nhanh) OR (hien hanh)) - thanh trung cua thong cong dan ((chan ban) or (chat ban))".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) OR (hien hanh)) - thanh trung cua thong cong dan ((chan ban) or (chat ban))*.