Perhaps you should try some spelling variations:
thieu sach » chieu sach, hieu cach, theo sach
thien hach » thien thanh, hien hanh
thanh tung » thanh cong
dang cong » dung cong
tong cong » trong cong, cong cong, dung cong
sang than » cang thang, dang thanh, sang tao
tung cua » trung cua, tuong cua, dung cua
than cau » toan cau, phan cau, than cap

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

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