Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sach » chieu sach, hieu cach, theo sach
thien hach » thien thanh, hien hanh
trung cua » truong cua, trung tuan, trung cap
dung cong » dung trong
nhanh cau » nhanh cay, thanh chau, nhanh ha
cua dung » cua dang, cua dong, qua dung
cong tac » cong ty
thanh ca » thanh cha, thanh cac, thanh ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((thieu sach) OR (thien hach)) - thanh trung cua dung cong tac ((thanh ca) or (nhanh cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thieu sach) OR (thien hach)) - thanh trung cua dung cong tac ((thanh ca) OR (nhanh cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((thieu sach) OR (thien hach)) - thanh trung cua dung cong tac ((thanh ca) or (nhanh cau))".
• Adding a wildcard symbol may retrieve word variants: toc ((thieu sach) OR (thien hach)) - thanh trung cua dung cong tac ((thanh ca) or (nhanh cau))*.