Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
trung tuan » trung thanh, trung tam, tran tuan
tuan thong » toan thong, tran thong, tuan phong
tieu sach » chieu sach, dien sach, te sach
phong van » phung van, thong van, hong van
phong va » thong va, phung van, thong van
tai chuc » tai cuc, toi chuc, tai chung

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - hanh trung tuan thong ((phong van) OR (phong va)) tai chuc~".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - hanh trung tuan thong ((phong van) OR (phong va)) tai chuc*.