Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trung » thanh trung, hanh trang, manh trung
thanh chau » thanh cha, thanh cham, thanh chu
tieu sach » chieu sach, dien sach, te sach
thanh cau » thanh mau, nhanh cau, thanh ca
cong ban » cong bang, cong san, cong tan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - ((hanh trung) or (canh tranh)) va nhung cong ban ((thanh cau) OR (thanh chau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - ((hanh trung) OR (canh tranh)) va nhung cong ban ((thanh cau) OR (thanh chau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sach - ((hanh trung) or (canh tranh)) va nhung cong ban ((thanh cau) OR (thanh chau))".
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - ((hanh trung) or (canh tranh)) va nhung cong ban ((thanh cau) OR (thanh chau))*.