Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sach » thien hach, hieu cach, theo sach
chieu sach » chinh sach, chiet tach, chieu sang
trung cua » truong cua, trung tuan, trung cap
tong cong » trong cong, dung cong, dang cong
cong cong » cong dong, trong cong, dung cong
dan than » dan chan, ban than, van than
than cap » khan cap, thanh lap, thanh cac

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 (chieu sach)) - thanh trung cua ((tong cong) OR (cong cong)) dan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thieu sach) OR (chieu sach)) - thanh trung cua ((tong cong) OR (cong cong)) dan than cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((thieu sach) or (chieu sach)) - thanh trung cua ((tong cong) OR (cong cong)) dan than cap".
• Adding a wildcard symbol may retrieve word variants: toc ((thieu sach) or (chieu sach)) - thanh trung cua ((tong cong) OR (cong cong)) dan than cap*.